perennials – Black Gold

Piece of Cake Perennials

Perennials are the floral backbone of my garden because they develop over time and last. I look for exciting new ones each year. Whenever a newly introduced perennial exceeds expectations and gets rave reviews, the plant will almost certainly find itself included on my spring shopping list.

I shared my favorites with customers when I managed the perennial section of a local nursery in Bloomington, Indiana. Now I can share them with Black Gold readers! I tend to like both easy and beautiful perennials with a long season of garden interest. All of the plants mentioned are pollinator favorites!

Piece of Cake Perennials

Old-fashioned lemon daylilies and tall purple phlox pair beautifully in the garden.

Daylilies (Hemerocallis hybrids, USDA Hardiness Zones 4-9, ) are notoriously hard to kill. That is why you can often find old-fashioned forms, like lemon lilies (Hemerocallis flava), blooming in vacant residential properties years after anyone has been around to feed or water them. Rebloomers and specialty varieties in vibrant shades of red, yellow, orange, pink, and purple. Some are very tall, such as the late-blooming ‘Autumn Minaret’ (5.5 feet), while others are compact, like the 12-15 inch ‘Little Grapette‘. Favorites with specialty blooms are ‘Diva’s Choice’, with bright, deep pink petals, and heavily ruffled yellow edges, and ‘Pansy Face Charmer’, yellow with dark purple edges that look like pansies.

Because of their ease of growth, daylilies are ideal plants for novice gardeners. Plant daylilies in full to partial sun in the mid-spring. They like average to fertile soil with good drainage. Bloom time varies, but most flower in the early summer. Rebloomers can continue to flower intermittently into fall with good care.

Tall phlox (Phlox paniculata, Zones 4-8) is a pretty, long-flowering perennial native to the eastern U.S. Height varies, depending on the variety, but they tend to reach between 2 and 4 feet tall. Cultivated forms have flowers that range in color from white, red, pink, and purple. Look for the vibrant-fuchsia-flowered ‘Material Girl’ (3 feet), coral-pink-flowered ‘Sunset Coral‘ (2.5 feet), and pink-flowered ‘Jeana‘ (4 feet) with its large panicles of small flowers known to attract pollinators in high quantities.

Grow tall phlox in the full to partial sun and fertile soil amended with Black Gold Natural & Organic Garden Compost Blend. With care, they can bloom for a month or two from mid- to late-summer.

‘Autumn Fire’ tall sedum has particularly bright pink flowers.

Tall and creeping hardy sedums (Sedum species and hybrids) comprise hundreds of hardy species of creeping, and mound-shaped plants, with thick, oval, succulent leaves. The popular tall, fall-flowering ‘Autumn Fire’ (18-24 inches) has brilliant pink blooms. The even taller ‘Thunderhead’ (30″) is an all-round beauty with its deep purple leaves and glorious rosy-purple fall flowers. Good low-growing forms for foliar and floral appeal include Proven Winner’s rose-flowered Rock ‘N Round^® ‘Superstar’ (12 x 20 inches)and the spreading, fully evergreen, golden-leaved ‘Angelina‘ (Zones 5-9) with yellow flowers in early summer.

Give plants sharply drained soil with average to good fertility. They are almost exclusively sun-loving and drought-resistant, save for rare exceptions like the eastern US native, two-row stonecrop (Sedum ternatum). Flowering time varies from summer to fall, depending on the type.

Purple coneflowers are truly effortless perennials loved by many pollinators. The cultivar ‘Magnus’ is shown.

Purple Coneflower (Echinacea purpurea and hybrids, Zones 3-9) are easy to grow, loved by pollinators, and their seeds feed songbirds. The popular purple coneflower is a member of the sunflower family native to eastern North America and adapted for life on open prairies. Established plants are hardy, drought-tolerant, and notably hard to kill as long as they are planted in a good location. Give them full sun, average to organic-rich soil and they will bloom from June to July. Some varieties will even flower into August.

One of the best classic varieties available is the vigorous, large-flower ‘Magnus‘ ( 3-4 feet) with its extra bright purple-pink flowers. According to an Echinacea trail at the Mount Cuba Center the red-flowered hybrid Lakota™ Santa Fe Coneflower, the raspberry-pink flowered KISMET® Raspberry, and the compact, warm coral-pink flowered SOMBRERO® Poco Hot Coral were some of the very best performers in northern Delaware’s hot summer weather.

Hostas (Hosta species and hybrids, Zones 3-8) are a spectacular group of perennials that hail from eastern China and Japan. They are prized for their ornamental foliage and regarded as shade-garden superstars. There are is no shortage of varieties and aficionados. Presently there are more than 3,000 varieties in existence and plenty of collectors and enthusiasts! The best source for additional information is the American Hosta Society. The sturdy plants can either be very large or miniature and flower only briefly, in either spring, summer, or early fall, depending on the variety. Some of my favorites are the gold and green ‘Glad Rags’, gigantic blue-green-leaved ‘Blue Angel’, variegated, wavy-leaved ‘Fire and ‘Ice’, and very large, infallible ‘Sum and Substance’ with its waxy, chartreuse leaves. Grow them all in fertile soil with plenty of organic matter.

The very old, double-pink ‘Sarah Bernhardt’ peony is one to support with a cage in the spring.

Common peonies (Paeonia lactiflora, Zones 3-8) (an old-fashioned flower pronounced “piony” by my grandparents’) are elegant spring-flowering plants native to central and eastern Asia. The large, late-spring bloomers have large single or double blooms that run the gamut from white to pink and red. Peonies are noteworthy for the sweet-sap-seeking ants that visit their globose flower buds. The ants do not harm the plants, so my advice is to leave the insects alone. Double-flowered varieties tend to have heavy blooms that flop in the rain, so many gardeners cage the bushy plants to better support the weighty flowers (click here to learn more). Full to partial sun is the preferred light and well-drained loamy soil is the preferred ground. The best time to plant them is in early spring or fall.

Pollinators of all sorts enjoy monarda flowers, including sphinx moths!

Beebalms (Monarda hybrids) are another group of plants native to North America and members of the mint family. The two most common garden spaces are Oswego tea (Monarda didyma, Zones 4-9), with its scarlet-red flowers collared by red-tinged bracts, and common beebalm (Monarda fistulosa, Zones 3-8), which features light lavender to pinkish-white flowers surrounded by green bracts often tinted with pink. Both plants are hummingbird favorites!

Monarda hybrids are common and numerous and are in shades of lavender, white, pink, and red. A common problem is powdery mildew, a foliar disease causing powdery white spots. Numerous resistant varieties are available, including ‘Red Velvet’ with its cherry-red flowers and bronzy foliage, and the compact ‘Leading Lady Razzberry’. Give the plants well-drained soil and full sun. Flowering occurs in the summer.

Perennials are very satisfying flowers. They bloom every year, and I always find room to plant new ones. When small plants arrive from catalogs or online nurseries, I always pot them up using Black Gold® All Purpose Potting Soil to let them grow larger before I put them in the ground. When they are large enough to plant in the ground in late spring, I amend the soil with Black Gold Natural & Organic Garden Compost Blend. Two of my favorite online perennial sources are Bluestone Perennials and Roots and Rhizomes.

Fragrant Garden Plants

Tall garden phlox are reliably fragrant summer perennials.

For the past couple of years, cold stormy springs blitzed our lilacs, of which we have many. That heady fragrance was sorely missed around the Keith household. We were spoiled for fragrance. But we were able to hang on until our other flowers and shrubs bloomed and took up the slack. We did lose some lilacs during that period, but we have had other, more catastrophic losses (dairy cows in the Jerusalem artichokes, for instance or the family dogs making off with the guest of honor on Thanksgiving morning, but leaving the turnips).

When the first spring flowers appear in March, the soil is often too wet and cold to be planted, so like all good things we have to wait. But we can stock up on the wonderful new varieties offered by local and national nurseries.

Bearing the title of this piece in mind, what to buy for a fragrance garden? See some suggestions below.

Fragrant Shrubs

‘Beauty of Moscow’ is a double-flowered lilac with pale pink and white flowers.

In general, lilacs (Syringa species and hybrids, USDA Hardiness Zones 3-8) can reach heights of 10-12 feet. Three especially fragrant varieties are ‘Beauty of Moscow’, ‘Bloomerang Purple’, and ‘Josee’. They are easy to grow so long as there is plenty of sun and the soil is alkaline and well-drained. The double-flowered ‘Beauty of Moscow’ has white blooms rising from pale pink buds. ‘Bloomerang’ lilacs (Zones 3-7) offer a richly fragrant purple lilac that blooms in spring and again in late summer or fall. The compact ‘Josee’ is a pink-flowered lilac that only reaches 4-6 feet.
Korean spice viburnum (Viburnum carlesii) is a compact shrub up to 6 feet in height. Flowers have an incredibly spicy aroma plus showy pink clusters of flower buds that develop into whiter flowers that attract hummingbirds and butterflies. The fruits are black berries and in fall, the leaves turn scarlet. Some sources consider them invasive, but most do not. Prune one time to remove dead branches or restrict growth, then leave it alone.

The flowers of Korean spice viburnum are some of the most sweetly scented of spring.

Roses (Rosa hybrids) epitomize garden fragrance, but there are so many varieties put out by so many growers, a list of the available cultivars would fill a small book. We have been purchasing roses from the David C. Austin Co. since we discovered them. Austin (now deceased) was a British rose breeder and writer. The company offers trademark English roses, and shrub and climbing roses for the garden. ’Rosa Boscobel’ is an English shrub rose of medium height with a heady, complex scent. It produces large, salmon-pink flowers throughout the growing season (Zones 5-9). ‘Rosa Munstead Wood’ is a crimson shrub rose with a rich, fruity aroma. It blooms for most of the growing season (Zones 5-9). They come in light purple, deep purple, and pink. They are also disease-resistant. Prune this group right after they finish blooming. Check local nurseries, or go to Proven Winners online.

David Austin roses are bred to flower beautifully and resist diseases.

Annual and Perennial Garden Flowers

Lavender is one of the best garden flowers for fragrance.

Lavender (Zones 5-10) These Old World natives are a natural addition to any fragrance garden. A summer bloomer (pink, blue, purple and white) that likes full sun and they are not too fussy about soil. Pollinators love them. (1-3 feet high)
Carnations (Dianthus hybrids, Zones 5-9) these well-known perennial flowers will add a welcome spice fragrance to your garden. They bloom in late spring, so you may want to plant another, summer-blooming species as well. Flowers come in shades of red, pink, and white. They prefer full sun but can tolerate partial shade. They like alkaline soil, so amend your garden with Black Gold® Natural & Organic Ultra Outdoor Planting Mix. Carnations are said to be toxic to humans, dogs, and cats. (18 inches high).
Woodland tobacco (Nicotiana sylvestris) is a re-seeding annual. Its moth-attracting flowers are white, long, tubular flowers, and most fragrant in the evening. The summer bloomer will self-seed if the flowers are allowed to go to seed. They like part to full sun and rich, well-drained soil. Bear in mind that this species is very toxic to humans and pets (3-5 feet high).
Garden phlox (Phlox paniculata, Zones 4-8) is a tall (2-4 feet), summer-blooming perennial that grows in neat clumps. The flowers come in shades of red, white, pink, and purple. The North American native grows in full to partial sunlight and needs good drainage and average moisture to thrive.

Woodland tobacco is a dramatic annual whose flowers emit enchanting night fragrance.

This is just a sample of the fragrant plants you might choose for your garden. You might also want to plant fragrant herbs as the border. Container plantings could also work well. Some tender species like lavender could be planted in containers and moved indoors when it gets cold.

Black Gold® offers the best in soil amendments and potting mixes for your garden, keep it in mind wherever and whenever you are planning all of your gardening projects.

Native Violets For The Garden

Halberd-leaf yellow violet (top right), Canadian violet (bottom right), Labrador violet (bottom left), and bird’s foot violet (top left)

Last spring I visited the Smokey Mountain National Park during high wildflower season, and I was struck by all of the unusual, beautiful native violets there. All had a delicate beauty suited to woodland and shade gardens. I started looking for garden center availability and was struck by the many North American violets available to native gardeners. Most are perennial, but a few survive as spring annuals.

Violets and Wildlife

‘Freckles’ is an uncommonly beautiful common violet. (Image thanks to Baker Creek Heirloom Seeds)

Overall, our native violets are easy, pretty, and have a place in the garden. In fact, they support wildlife more than most might think. Even the native common blue violet (Viola sororia, Zones 3-9), which gardeners often weed from their beds and lawns, are beautiful and feed the larvae of many species of fritillary butterflies, which are close relatives of monarchs. According to the Xerces Society, a whopping 14 species of greater fritillaries (Speyeria spp.) and 16 species of lesser fritillaries (Bolloria spp.) lay eggs on common violet leaves for their caterpillars to feed upon, develop, and grow. The fragrant flowers, which have bee nectar guides and are largely pollinated by native bees, are also visited by butterflies. Some native bees are even specialized for Viola flower pollination, such as the violet miner bee (Andrena violae).

Most fritillaries are orange and black. Different species have different pattern markings and ranges.

For these reasons, they are worth leaving alone in lawn areas or other places in the yard. Let them sow and spread freely where they do not compete with other garden plants. If you don’t have common violets in your yard, a good garden variety to try is the beautifully speckled ‘Freckles‘. My mother started it from seed over 25 years ago, and they are still beautiful in the garden! The flowers look very pretty clustered in small bud vases.

Six Beautiful Native Violets for the Garden

Most native violets grow best in fertile, moist soil and partial sun to shade. They also tend to spread, some slowly and others more quickly. They make fine garden perennials, especially for more naturalistic beds. Any exceptions to these rules are noted.

My favorite native violet is the bird’s foot violet, which has large 1.5-inch flowers and fine foliage.

When researching these native violets, I quickly found that all native American violets feed numerous native bees and play larval host to many fritillary species–too many to be mentioned by name. Lots of American fritillaries are threatened or endangered, so maintaining a few native violets in your yard is important! It is also important to source nursery-grown stock or seeds rather than plants collected from the wild. (Click here to learn more about avoiding poached, rare plants.) All seed and plant sources provided here are legitimate.

Labrador violet is often evergreen to semi-evergreen and has purplish-bronze foliage.

Canadian violet (Viola canadensis, Zones 2-8): These hardy perennial violets can reach up to 12 inches and produce lots of white or pale-violet spring flowers that stand tall above the large, heart-shaped leaves. It makes a pleasing native groundcover for moist woodland or shade gardens and is native across much of central and northern North America, extending far into Canada. Expect Canadian violet to self-sow and spread naturally to create a seasonal native groundcover for the shade.

Halberd-leaf yellow violet (Viola hastata, Zones 5-8): Though rarely sold in commerce, at all but the most select native plants sales hosted by native plant societies, Halberd-leaf yellow violet is one of the prettiest of all native woodland violets. Its attractive leaves have silvery markings and sunny yellow flowers are produced in the spring. The woodland native is found in old woods across the eastern coastal United States. If you can find it, grow the 4-8-inch plants in a moist, shaded garden spot.

American dog violet (Viola labradorica, Zones 2-8): Just look at that hardiness zone! This little 3-6-inch violet has native populations that extend into the farthest north reaches of eastern Canada, and it is so lovely. Its low-growing bunches have purplish-bronze, heart-shaped leaves as well as royal-violet-purple flowers in the spring and summer. It is evergreen to semi-evergreen, making it an excellent small-scale groundcover violet for the full sun to partial shade.

Smooth yellow violet is a sweet little yellow-flowered species for shaded gardens.

Bird’s foot violet (Viola pedata, Zones 4-8): I love this unique violet for its fine foliage, which resembles little green bird’s feet, and wide, violet-blue flowers punctuated by orange eyes. They are found in old, established sandy woodlands across eastern North America. Expect the 1.5-inch flowers to appear from spring to midsummer. They will tolerate full to partial sun. Well-drained soil and regular moisture are required. The 3-10-inch plants do not tend to spread.

Prairie violet (Viola pedatifida, Zones 3-7): The sun-loving little prairie violet is native across the prairie lands of Central North America and spreads less aggressively than average violets. Its bright violet-purple flowers look pretty against the delicate, cut-leaf foliage. Unlike most violets, prairie violet will tolerate drier soils. Flowering occurs from mid-spring to early summer. Sometimes it will rebloom later in the season. Plant the 6-inch violets along garden edges where they can slowly self-sow.

Smooth yellow violet (Viola pubescens var. eriocarpa, Zones 3-7): Here is a pretty yellow-flowered violet that grows best in shaded, moist, eastern North American woodlands and gently spreads. Expect it to produce little yellow blooms from mid-spring to summer. Standard Viola pubescens has downy rather than smooth leaves.

Starting Native Violets From Seed

Violet seeds are easily collected or available for sale.

These perennial violets are most often sold from seed, so they are not expensive to grow. Most take a year before flowering from seed. We recommend sowing the seeds in flats of quality potting mix, such as Black Gold Natural & Organic Potting Mix, outdoors in the fall. This method, called moist outdoor seed stratification (click here for stratification guidelines), lets them experience the winter moisture and cold, which many violet seeds need to germinate. When grown by this method, they often sprout in the late winter or spring.

Other Violet Uses

Violets serve other useful purposes in the garden. The flowers are edible, and their fragrant blooms have been used to make perfume over the ages. One common old-fashioned use for the flowers was to candy them. The sugar-crusted violets hold their color, are tasty, and look beautiful for decorating cakes and cookies. (Click here for a good candied-violet recipe.) The flowers can also be used to make a delectable, violet-blue simple syrup that can be added to mixed drinks and lemonade. (Click here for a good violet simple syrup recipe.)

If you have lots of common violets in the yard, try making candied violets.

Can You Force Daylilies for Indoor Enjoyment?

“My mother is ill and can’t get out of the house. She misses her garden, especially her daylilies. Would it be possible for me to move some of these into pots and have them thrive indoors? If so, any special care for them? Thank you!” Question from Jenifer of Saint Petersburg, Florida

Answer: We are so sorry to hear that your mother is ill and hope that she recovers soon. Daylilies (Hemerocallis hybrids) are hardy, summer-flowering perennials that grow best outdoors. They can, however, be forced to bloom early, so you could force some for indoor enjoyment for several weeks or more. Another option is to look for blooming specimens at local garden centers to bring to your mother. If you cannot find any, then try forcing your mother’s daylilies. Here are some recommendations.

Daylilies For Forcing

Most daylilies can be forced, especially newer, reblooming varieties. Because the plants will be potted and you want flowers fast, avoid forcing tall or late-blooming daylilies. Stick with compact, early, heavy-flowering types. The time it takes to force flowers varies from variety to variety.

How to Force Daylilies

We gathered this information from Greenhouse Product News magazine, which is for professional growers. Here is a shortened version to better help home gardeners force daylilies if desired.

Larger clumps will produce more flowers, so start with a good-sized clump (perhaps 5-6 inches across at the base) that is either dormant or recently leafed out. Make sure that all of the roots are intact.
Pot the daylily in a medium-sized pot with drainage holes at the bottom and a saucer to catch water. Be sure to cover the roots and leave the shoots or buds above the soil surface. Plant the daylily in quality, well-drained potting mix, such as Black Gold All Purpose Potting Mix.
Water the pots in until water drains out of the bottom. Keep the soil lightly moist, never saturated.
Daylilies are day-neutral plants that like lots of sunlight. High-intensity light will encourage them to bloom fastest and encourage full growth, so place them in the sunniest window of the house. You may need to provide supplemental grow lights if you lack a sufficiently sunny window.
Cool growing temperatures help daylilies bloom faster. The article author, Paul Pilon writes: “In these trials, reducing the temperature from 75° F to 60° F increased the time to flower by eight to 15 days for most cultivars. I recommend growing daylilies at 65° F in environments with high light intensities for best results.”
Plants take several weeks before growing full and budding out.

I hope these tips help. Start by contacting local garden centers to see if they offer blooming plants. Some may even be able to order flower daylilies for you. If not, now you have another option.

All the best,

Jessie Keith

Black Gold Horticulturist

Growing Perennials From Seed

Coneflowers, catmint, rudbeckia, and butterfly weed (top left, clockwise) are all easy to start from seed.

Spring will be here before you know it, and this means it is time to buy this year’s perennials, whether old favorites or new ones you haven’t tried before. The problem is how much they cost. To plant a modest new bed of perennials, you can expect to pay over $100 for just eight to ten plants. Growing them from seed is much more cost-effective if you know what to grow and how to grow them.

As a lifelong gardener and former perennial nursery manager, I am sensitive to the cost of these garden staples. Perennial plants seem to get more expensive year after year. For example, I planned to buy several butterfly weeds (Asclepias tuberosa) this season to help the struggling Monarch butterflies. But, even small pots are $8 to $10 per plant or more. Most designers recommend planting garden flowers in groups of three or more, so that is a minimum of $30.00 for just three plants, and more is always better. That is a lot of money! In turn, butterfly weed seeds are usually no more than $3.50 for a packet of 50 seeds. Wouldn’t it be nicer if you could grow them from seed and save a fortune? Here’s how to do it.

Perennial Seed-Starting Materials

Full-spectrum grow lights encourage denser shoot growth in indoor-grown seedlings.

There are a few essentials that home growers need if they are not fortunate enough to own their own greenhouse, conservatory, or sunroom. The items are low-cost and most can be used year after year. I do not recommend windowsill seed starting if you intend to grow seedlings to planting-sized plants because even south-facing windows don’t provide enough uniform light to keep seedlings from stretching and becoming spindly. Fancy seed starting racks or systems can be purchased, but I have always found the following materials to work just fine for all of my seed starting needs, and I’ve been doing this for nearly 50 years.

Grow Lights and Fixtures

First of all, you need to buy grow lights. Plants require most wavelengths of light to feed themselves and grow, so the more full-spectrum the bulb the better. Four-foot-long shop light fixtures fitted with fluorescent grow bulbs is the most economical option, though other bulb and fixture options exist. (Click here to learn more about different grow bulbs, and Click here to learn the difference between shop light bulbs and grow light bulbs.) The best prices I have found online are for the AntLux 4ft Full Spectrum LED Shop Lights and Fixture, and the Durolux 4Ft Full Spectrum Fluorescent Lights and Fixture.

Seed Starting Trays and Labels

Then you will need special seed starter trays. It is a small investment, but quality starter trays can be washed and reused for many years. I recommend Delxo Seed Starting Kits with trays that have 48 individual planting cells for lots of seedlings and a watertight base tray. The kits also come with plastic covers with air vents at the top to control temperature and humidity, plus small tools, to help plant the seeds, and remove the seedlings. The kit even comes with its own labels, though I always like to have extra wooden planting labels because they are always handy.

If you reuse your trays or labels from year to year, be sure to scrub them out with hot water, dish soap, and a little bleach before using them again. Remember to rinse them well to remove any bleach residue.

Seed Starting Mix, Fertilizer, and Waterer

And lastly, you need a special seed starting mix, such as Black Gold Seedling Mix, which is extra fine for small or large seeds and lacks added fertilizer or salts, which can inhibit sprouting in some seeds. Our OMRI Listed Black Gold Seedling Mix also has an added organic wetting agent, to keep it from repelling water when dry, and it contains RESiLIENCE, a special silicon additive that is believed to promote better root growth, denser branching, and faster recovery should you forget to water.

Once seedlings start to put out their true leaves, you can start fertilizing them. I always choose quality, all-purpose, water-soluble fertilizer, such as Proven Winners Water Soluble Plant Food. Seedlings need gently water from the top in addition to bottom watering. Misters or small watering cans are very useful for seed starting.

Perennial Seeds

Before addressing what to grow, there are two sources for perennial seeds that I always use and highly recommend. The first is Park Seed (visit their website to request a catalog). They have a huge collection of seeds, and I have been buying from them since the early 1970s. Their seeds are always fresh, well packaged, and germinate well. The other perennial source I adore is Select Seeds. They are the only company I know of that has heirloom flower seeds, some going back to the 1600s. Their packets are filled with many seeds, and they always do well for me. Swallowtail Seeds has lots of varieties and comes highly recommended. Finally, my oldest daughter grows lots of native perennials and has recommended Prairie Moon Nursery to me on many occasions for their quality seeds. You might also try your hand at seed collecting from year to year, if you feel adventurous.

Perennial Seed-Starting Steps

Read Your Seed Packets

Start by reading your seed packets from cover to cover. Some perennial seeds can be planted with no preparation, but some need to be nicked or chilled in the refrigerator for several weeks to properly germinate. Those that I highlight below are not challenging to start, but It is good to know that some seeds need a little more attention.

Gather Your Materials and Prepare Seedling Area

Next, gather all of your materials. Make sure to hang your lights and prepare your growing area. I like to put down a plastic table cloth to protect any tables from leakage and for easy cleaning. Fill up your watering cans and misters, and get going.

Prepare Your Planting Trays

Wash your hands before starting, to avoid any contamination. Put the seedling mix into a bowl, and wet it until uniformly moist. Fill the cells in the trays with the moistened seed starting mix, and be sure to leave a little space at the top for large-seeded perennials. (After reading the back of your seed packets, you will know if the seeds need to be covered or not.) I like to determine how big seeds are before I start planting. Some seeds are dust-like (Begonia seeds), while others are very large (perennial sunflower seeds), so some are simply sprinkled on the soil surface while others must be covered.

Sow Your Seeds

There should be just one seedling per cell. Extras can be moved or pinched out.

I like to sow two seeds per cell to make sure I get at least one seeding per cell. When working with small to medium seeds, I sprinkle two into the cell, making sure that they are separated, and then gently press the seeds down into the mix. (If both seedlings pop up, I either remove the weakest seedling after the seedlings have grown a bit, or I gently move one of the seedlings to an empty cell.)

Label, Water, Cover

Label the cells, either as groups or individually, marking each different flower you are growing and the date planted. Mist the seeds, but make sure that the soil is moist, not saturated. Saturated soil will cause seeds and seedlings to rot before they get a chance to grow. Put the cover on the tray, and lower the lights as close to the tray as possible. The plastic cover keeps the mix from getting dry, but aeration is also important. Sometimes I lift the cover for several hours in the day to let things dry out a little.

Seedling Care

Seedlings for fast-growing perennials may need to be upgraded into 4-inch pots. Consider this at planting time with respect to space.

Once the seedlings have all popped up, remove the lid entirely. Too much moisture will cause damping off, or seedling rot. When you have removed the lid, keep the grow lights just inches above the small plants. This will encourage the densest growth and keep plants from becoming leggy. This is also the time to start feeding the seedlings weekly with a 1/2 strength solution of fertilizer. Fast-growing perennials may need to be upgraded into larger, 4-inch pots, some won’t. They will also require a little more water, so make sure you don’t let them get dry. Lightly moist soil is recommended. When your seedling is large enough to plant, usually 5-8 inches, and the spring weather allows, it is time to harden them off and get them planted.

Harden Seedlings Off

When the threat of frost has passed, it’s time to move the seedlings outdoors for hardening off, which reduces shock and helps perennials acclimate them to a sunny, outdoor environment. Start by bringing the trays outside, starting with a couple of hours, and increasing it until they are well adapted to the light, wind, and temperatures of the outdoors. After a week or so of hardening off, you can plant your perennials in the garden!

Planting

New plants always grow best in a prepared bed (OMRI Listed^® Black Gold^® Garden Compost Blend will increase organic matter and drainage) or container filled with quality potting soil. Be sure to plant your seedlings in locations with the right sun and soil for their needs.

At planting time, be careful with your little perennials. When removing one from a cell never pull it out from the top. Instead, tip the tray partway over and push up from the bottom to release the roots. A butter knife can also be used to lift small plants from cells or loosen perennials from a 4-inch pot. fertilize time-released fertilizer for easy summer feeding.

What Perennials to Grow from Seed

Coneflowers are the easiest and most satisfying perennials to grow.

There are lots of easy perennials that will bloom in the first year from seed. I have grown and enjoyed ‘Gay Butterflies’ butterfly weed, black-eyed Susans (Rudbeckia spp.), phlox, catmint (Nepeta spp.), asters (Symphyotrichum spp.), perennial geraniums, salvias, blanket flower (Gaillardia x grandiflora), and many other wonderful, easy perennials from seed. Over the years, they have brought me much joy and saved me lots of money! Here are growing details for a few of these.

Purple Coneflower (Echinacea purpurea)

First, I recommend growing varieties of coneflower (Echinacea spp), which is one of the easiest perennials to grow from seed. I especially recommend the AAS award-winners, ‘Pow Wow Wildberry‘, which has large, bright pink flowers, and ‘Cheyenne Spirit‘ with its mixed coneflowers in lovely sunset colors. Both will sprout in no time and bloom in the first summer. Bees and butterflies will cover the blooms. (Click here to see more varieties.)

Seed Starting: Cover seeds lightly with seed starter, and keep them lightly moist. average room temperatures between 65º and 70º F encourage good germination. Seeds should sprout within three weeks.

Blanket Flower (Gaillardia x grandiflora)

This tough, North American native blooms through summer with deadheading and can take the heat. Perennial blanket flower is also very easy to start from seed. There are lots of pretty varieties available, just be sure that the ones you choose are G. x grandiflora cultivars because most others are annuals. The sunny peach-flowered ‘Mesa Peach‘ is a very pretty one to try as is the red and gold ‘A rizona Sun‘.

Seed Starting: Cover seeds with a little seed starter, keep lightly moist, and maintain a fairly warm room temperature. Germination often takes one to two weeks.

Salvia (Salvia nemorosa)

Purplish salvia flowers line the upright stems of this salvia through summer with deadheading deadheaded. If plants are started in February or March, they should bloom in the first year. (Click here to see lots of seed options!)

Seed Starting: Lightly cover the seeds with seed starting mix and keep slightly moist. Place seed pots 4 inches from grow lights for best results. A heat mat can also be useful. Germination should take three weeks or more.

Click here for an article about how to grow Lavender from seed.

Click here for an article about growing milkweed from seed.

Click here for an article about growing award-winning annuals from seed.

Growing Gorgeous Gladiolus

There is nothing more beautiful in the summer than sword lilies (Gladiolus hybrid) in a vase or the garden. Their stately stalks of glowing, fragrant flowers come in an array of colors that just can’t be beat! Most gardeners grow them for cut flowers, but glads can also be carefully worked into summer flower borders for floral impact. There are also compact types suitable for border edges and even containers!

A Short History of Garden Gladiolus

Gladioli have bulbous root structures called corms that can easily be dug in fall for winter storage where they are not hardy.

Though Gladiolus species exist across much of the Old World, most garden gladioli originate from complex hybrids of numerous South African species–South Africa being the world center of Gladiolus diversity. World travelers and collectors brought the first South African specimens to Europe in the mid-1700s, and the earliest hybrids appeared by the early- to mid-1800s. Commercial nurseries continued developing their own hybrids (and do to this day), and the flower took off in popularity. By Victorian times, when meanings were attached to every flower, red gladiolus flowers signified love and passion, while pink ones meant femininity and motherly love.

Planting and Caring for Gladiolus

Byzantine sword lily is a beautiful species that is quite hardy.

Start planting gladioli a week after one’s last frost date (click here to determine your last frost date). Choose a sunny spot with fertile, well-drained soil that’s high in organic matter. To keep waves of these short-season flowers blooming from early summer on, plant more corms in two-week intervals until late June. Gladiolus have bulbous root structures called corms that need to be planted in 5- to 6-inch holes. I always put some fertile, OMRI Listed Black Gold Natural & Organic Garden Soil and bulb fertilizer in the bottom of the hole to ensure good growth. Plant corms in rows 6 to 8 inches apart in a cutting garden or more closely in small groups of 5 to 9 corms mixed in with tall, bushy perennials to provide upright patches of bright color. Water evenly. Gladiolus do not like wet feet or parched soil conditions.

Glads are one of the most long-lasting cut flowers for bouquets, which is why commercial florists love them. They can last for a week or two in a vase. Pick them when the stems just start blooming and remove the lower leaves. Cut the stems diagonally with sharp shears, and put them in water fortified with cut-flower food. A tablespoon of fully sugared lemon-lime soda to a quart of water also works.

Some gladiolus are hardy but most are tender. Gently dig the corms of tender types up in fall when their leaves turn yellow. You will find new, small cormlets attached to the main corm. Keep them all to grow new plants, though the cormlets will take a full second season to reach flowering size. Put the corms in a warm, dry place for 2 weeks until they are dry. For storage, hang them in mesh bags in a cool, dry place through winter.

Gladiolus to Grow in Gardens

Unsupported tall glads tend to fall over, which is why caging or staking is recommended.

There are several types of gladiolus for gardeners to grow.

Standard sword lily (Gladiolus hybrids, Zones 8-10) range in height from 3 to 6 feet tall and may have up to thirty 5- to 6-inch flowers on each stem. There are hundreds of exciting varieties. A festive choice is ‘Frizzled Coral Lace‘ with lacy coral-pink flowers that fit the name. The rose and peach ‘Guinea‘ is a very pretty extra tall one, and the breathtaking ‘Zizanie’ has large blooms in broken shards of red and white. When planting taller glads like these, choose a location with low wind and surround the plants with perennial or tomato cages to keep them upright. Staking also helps. Planting corms an inch deeper may also assist with stabilizing the plants.

Hooded sword lily (Gladiolus primulinus hybrids (syn. G. dalenii), Zones 8-10) are shorter (2-4 feet) and have an unusual floral shape, with the top petal of the flower hanging over the rest. They have large blooms, often with ruffled edges, that come in lots of color variations. An extra pretty one is ‘Las Vegas‘ with its primrose-yellow flowers edged in scarlet. The bright red ‘Mirella‘ is another choice selection.

Dwarf sword lily (Gladiolus nanus hybrids, Zones 7-10) reach only 1.5 feet tall. They have large flowers in many colors, including lots of bicolors. Some of the blooms are white with a rose teardrop on every petal. Dwarf glads are hardier, so more gardeners can grow them as perennials. Try the super-compact varieties in the Glamini® Series. They are less hardy (Zones 8-10) but perfect for containers or summer borders.

Exceptional Gladiolus species are offered by some bulb companies. One of the best is the hardy Byzantine sword lily (Gladiolus communis subsp. byzantinus, Zones 6-10) with its upright swords of smaller, pink flowers. It is an heirloom that makes a fine addition to old-fashioned perennial gardens. Another to try is the large-flowered branched sword lily (Gladiolus ramosus, Zones 8-10). The brilliant pink, purple, and red ‘Vulcano‘ is spectacular! The hardiest of them all is the butterfly sword lily (Gladiolus papilio, Zones 3-6). Try the bold, deepest-red ‘Ruby‘ with its striking, butterfly-like blooms on 30-inch stems.

More Gladiolus Notes

Hooded gladioli have top petals that create a hood over the bloom.

About leaving corms in the ground, I have some standard red hybrid sword lilies that I did not get around to digging up last fall in my USDA Hardiness Zone 6 garden. Imagine my surprise when they came up hale and hearty this spring. I was really surprised! I have read that planting them in 7- to 8-inch holes will increase the chance of them coming back ni northern gardens. Some mulch over the top also helps.

Two excellent companies I recommend for buying glads are Brent and Becky’s Bulbs, and K. van Bourgondien. Glads are blooming bountifully now, but their corms are only sold in the spring, so look for them in March to have the pick of the best varieties. Gladiolus are some of the most gorgeous flowers in the summer garden, so plan to plant some in yours.

Perennial Spring Beauties for Gorgeous Gardens

There are many perennial flowers that come up in early spring, to let us know the beauty of our spring gardens has arrived. After a long year of COVID-19, and the recent terrible weather across much of the US, I want to boost my spirits with as much garden color as I can. Other gardeners that I know plan to do the same. Here are some of the best spring perennials that I grow and enjoy each year in my Indiana garden. These are sure bloomers with lots of color!

Lenten Rose

‘Fire and Ice’ is one of the prettiest double *Helleborus orientalis* varieties.

Lenten Rose (Helleborus orientalis and hybrids, USDA Hardiness Zones 6 to 9) are among the first flowers to bloom, from February to April depending on where you live. The large leathery leaves are evergreen. Each plant produces several stems of flowers. The blooms can reach up to 3.5 inches across. These range from single blooms, to rose-shaped doubles. Some are single-colored, while others have the most spectacular spots, such as ‘Confetti Cake’. The yellow and maroon bicolored Honeymoon^®Spanish Flare is a favorite this year, in addition to ‘Fire and Ice‘, which is a white picotee with dark-rose edges.

In spite of the common name, Helleborus are not real roses. Instead, they are closely related to buttercups. They like shade, and moist, well-drained, soil. Plant them in spring, being sure to add B lack Gold Garden Soil into the planting hole for added organic matter and fertility. Keep the crown of the plant just under the soil, for better blooming. For nicer leaves, cut back the old ratty ones, at the end of winter. Water more from spring to fall since it is the primary growing period. Lenten roses are generally 2-feet tall and wide. All plant parts are toxic, so be careful if you have pets and small children. (Click here to learn more about Lenten rose toxicity.)

Virginia Bluebells

An old spring favorite is a native plant, Virginia Bluebells (Mertensia virginica, Zones 3 to 8). In spring, it sends up 2-foot stems, with numerous, nodding purplish-pink buds, that turn into bright, trumpet-shaped bluebells. They naturalize and like shade and moist, rich soil. The whole plant goes dormant as summer approaches, so it is best to plant them in the fall among other perennials that will cover the holes that they leave behind.

Lungwort

Raspberry Splash has multicolored spring flowers.

Lungwort (Pulmonaria species and hybrids, Zones 3 to 7) derives its name from the long-ago days when it was thought that a plant, with similar leaves to a body part (like the lung), would be beneficial in treating that body part. Lungwort has spotted leaves, like the spots on the lung, thus its common name. At one time they tried to use it to treat lung ailments, even though it is Lungwort is toxic. (Click here to learn more.) I am happy that the days of Medieval medicine are gone forever…

Pulmonarias have become very popular over the last 25 years, so there a lot of varieties available. They are grown both for their leaves as well their beautiful flowers. The flowers range from deep blue, to sky blue, deep rose, and light pink. The lovely plants are about 16-inches tall when in bloom, give or take, and like full shade and moist, rich garden soil. Cut back any bad-looking leaves through the season and watered them well through summer to keep the leaves looking beautiful. Here are some of my favorite varieties: ‘Silver Bouquet’ has flowers that change from coral to pink to violet, and the long, pointed leaves are pure silver. ‘Raspberry Splash’, from Proven Winners, has deep rose flowers and leaves with large silver spots. Also from Proven Winners comes ‘Spot On’ with its speckly silver leaves and deep pink buds that change into a dark, intense blue.

Columbine

Columbines (Aquilegia hybrids, Zones 3 to 8) are some of my favorite late spring flowers, with clumps of scalloped leaves that send up narrow stems topped with shooting-star-shaped flowers with long nectaries at the base of the petals. The slender stems get 12 to 20 inches tall, depending on the variety, and support numerous flowers. Each flower has spiked petals of red, yellow, rose, purple, blue, or pink, and inner petals that are usually a lighter version of the same color. Hummingbirds, butterflies, and bees love them.

Columbines are popular, so there are many different varieties available. Most do best in full to partial sun, though some species prefer partial shade, such as the native red eastern columbine (Aquilegia canadensis). The McKana Giants comprise an excellent columbine mix that is easy for new gardeners to try. The tall stems bear huge flowers in many colors, and they are easily grown from seed. The western native golden spur columbine (Aquilegia chrysantha) is an uncommonly good garden species with its large, long-spurred golden flowers.

Another reason that I like columbines so well is that they randomly cross and reseed easily, with new hybrid plants blooming each year. So, you never know what you are going to see in the garden at flowering time.

Barrenwort

Barrenwort, or Bishop’s Hat, (Epimedium species and hybrids, Zones 3 to 9) is a low-growing plant, with delicate flowers, on narrow 12-to-18 inch stalks, held above heart-shaped leaves. In spring they may produce flowers of lilac, pink, yellow, orange, white, or rose, depending on the plant. With some varieties, the leaves are deep red with green veins or are edged in purple. I consider it to be a slow-growing ground cover, excellent as a front-of-the-border plant in a shade garden. Barrenwort will tolerate dryer soil than most other shade perennials. Some excellent varieties are the orange-flowered ‘Orangekönigin’, my first barrenwort, as well as the white-and-purple-flowered ‘Cherry Blossom’, double-flowered ‘Rose Queen’, and airy, yellow-flowered ‘Old Yeller’. To keep the leaves looking good, cut back the old ones in late winter, or early spring.

When planting, remember to mix Black Gold Garden Soil with the existing soil that you dig up to give an extra boost to the plant, shake a little Premium Proven Winners Controlled Release Fertilizer along the soil surface, and you’ll be off to a good start for the gardening season.

What Are Some Good Perennials for Southern California Rock Gardens?

California fuchsia is a good, low, flowering perennial for your area.

“I’ve looked into a lot of options and have decided that Aubrieta / Rockcress is best for our needs. I have not finalized a choice as far as variety. I found it difficult to buy potted plants (even for ones on sale for 2021). I’m going to go ahead and get seeds. *BUT* … as I’ve been reading I’ve run into 2 or 3 sites that say – they will bloom in their second season in the year after planting them (and then every year after that). Is that true? I’ve done my very best to search for an answer…and I’ve come up with nothing more than when I started… I was hoping someone could let me know what the deal is? And/or If there is a way to jumpstart the progress – so I wouldn’t have to wait a year for them to bloom? I forget what number zone I’m in – but if it makes any difference at all… I live in West LA (zip = 90064). I’m also wondering if I can mix some type of Phlox seed with whatever variety of Aubrieta / Rockcress I choose? Is that doable? Or would I need to carefully separate which area I put 1 variety of seed and keep it separate (being careful not to mix) the phlox seed in? I so appreciate your time in this and would very much be thankful for some guidance.” Thank you! Jess of Los Angeles, California

Answer: Sadly, your 10b USDA Hardiness Zone is too warm for rockcress (Aubrieta spp.). The alpine plant requires survives in Zones 4-9, which means that it needs more winter cold to survive from year to year. With that said, there are many other evergreen, flowering, low-growing, rock garden plants that will perform well in your Los Angeles garden. I’ve opted for native options that are as tough as nails. Here are five from which to choose.

Flowering Perennial Groundcovers for Southern California

Wayne Roderick Daisy (Erigeron glaucus ‘Wayne Roderick’): Beautiful little pale violet cover this tough spreader through the growing season.
Margarita Penstemon (Penstemon heterophyllus ‘Margarita’): This tough, drought-tolerant spreader bears beautiful blue flowers in summer.
Coastal Groundcover Gum Plant (Grindelia stricta var. venulosa): If you like yellow, you will love the sunny daisies that cover this spreading California perennial. Bees love them.
Sierra Penstemon (Penstemon heterodoxus): Expect this drought-tolerant California alpine to remain evergreen through the hottest weather. Its purple flowers attract hummingbirds and bees.
California fuchsia (Zauschneria septentrionalis ‘Mattole River’): Hummingbirds cannot get enough of the bright red flowers of California fuchsia.

I hope that some of the options interest you. All are so pretty and should grow beautifully where you live.

Happy gardening,

Jessie Keith

Black Gold Horticulturist

Fall Garden Flowers of the Prairies

The golden strands of the prairie native, wrinkleleaf goldenrod, look right at home in a fall flower garden.

So many favorite summer garden flowers were originally natives of the American prairies–purple coneflowers, black-eyed-Susans, and blazing star among them. Fall is no exception. Whether you plant wild forms or garden varieties, flowers of the prairie are generally easy, tough landscape plants. (If they could withstand trampling and grazing by elk and buffalo, they surely can grow well in your garden!) Some can be planted now, while others can be added to your plant list for next spring.

It’s never too late or early to start thinking about next year’s flower garden, and late summer and fall is the time to see what’s looking beautiful or not-so-great in your garden. Look for holes where a little more color and interest could do some good. You might also make space by removing or thinning out any disappointing or overcrowded plants. Once space has been made, plant now or plan for next spring.

Fall Garden Flowers with Prairie Origins

Native prairie in Lake County, Illinois looks almost planted with its colorful New England asters and Canada goldenrod.

All of these stellar garden plants have their origins from native prairie wildflowers of North America and grow best in full sun and fertile to average soil with good drainage. Feed beds with organic matter yearly to keep your garden soil and plants happy. Black Gold Garden Soil or Flower & Vegetable Soil are excellent amendments for tired beds in need of a boost.

Fall Asters

Alma Potschke New England aster has brilliant reddish-pink, semi-double flowers

Perennial asters are favorite fall flowers, and most originate from American grass and prairie lands. Their little daisies can be single, double, or even puffed and come in purple, violet-blue, white, reddish-purple, or shades of pink and lavender. There are many notable species. Of these, I like the tall New England Aster (Symphyotrichum novae-angliae, 2-6 feet, USDA Hardiness Zones 3-8) with its bright purple daisies and ability to grow in both moist and dry soils. Aromatic aster (Aster oblongifolius, 2-6 feet, USDA Hardiness Zones 5-8), which is tolerant of poorer soil, is another winner with its fragrant foliage and lavender-blue flowers with golden centers.

Exceptional varieties include the classic Purple Dome New England aster (Symphyotrichum novae-angliae ‘Purple Dome’, 18 inches x 12-24 inches), which is compact and has the deepest purple flowers that bloom in midfall. The taller Alma Potschke New England aster ( Symphyotrichum novae-angliae ‘Alma Potschke’, 3-4 feet) has a wealth of semi-double flowers of reddish-pink. The cool October Skies aromatic aster (18 inches x 18 inches) bears a dense display of lavender-blue flowers with yellow centers on compact plants. Butterflies, birds, and bees love asters, but deer don’t.

Goldenrod

Most associate the name Goldenrod with tall field weeds, but they are not weeds at all. (And, forget the old wive’s tale that they cause seasonal allergies; goldenrods bloom at the same time as allergy-causing ragweed, hence the confusion.) Nurseries have developed some beautiful varieties, worth planting in your garden for fall color. One of these is Golden Fleece goldenrod (Solidago sphacelata ‘Golden Fleece’, 2 feet x 3 feet, Zones 4-9), which becomes heavily adorned with cascading streamers of bright golden flowers from the middle of September through October. Plant it in full sun and average to dry soil, then sit back and enjoy the butterflies. Trim off old flowers to encourage new ones. ‘Golden Fleece’ is deer resistant.

For a bolder statement try the Fireworks wrinkleleaf goldenrod (Solidago rugosa ‘Fireworks’, 3-4 feet, Zones 4-9) with its impressive sprays of golden flowers that explode in mid-fall. Plant it towards the back of a border beside tall ornamental grasses, tall mums, and Joe-Pye weed.

Sunflowers and Oxeye Daisies

‘Tuscan Sun’ oxeye daisy is very pretty and heavy flowering. (Image by Jessie Keith)

Perennial sunflowers (Helianthus spp.) and oxeye daisies (Heliopsis spp.) look similar, but oxeyes often bloom earlier and continue flowering into fall. One of my favorites is Burning Hearts oxeye daisy (Heliopsis helianthoides var. scabra ‘Burning Hearts’, 3-4 feet, Zones 3-9), a particularly colorful and long-blooming variety that flowers from midsummer to mid-fall. It has purplish leaves and black stems that hold 3-inch flowers of gold with fire-red centers that fade to bronze. Another excellent choice is Proven Winners’ all-gold ‘Tuscan Sun’ (2-3 feet, Zones 3-9). Be sure to water oxeyes during dry periods, and plant them in full sun. Bees and butterflies cannot get enough of these flowers.

The compact Autumn Gold willowleaf sunflower (Helianthus salicifolius ‘Autumn Gold’, 2-3 feet, Zones 5-10) has a mounding, mum-like habit and becomes covered with sunny, yellow flowers in mid to late fall. Leave the nutritious seed heads for foraging birds. Once established, ‘Autumn Gold’ will tolerate wet or dry soil conditions, likes full sun, and is deer resistant.

Joe-Pye-Weed

Spotted Joe-Pye weed (Eupatorium maculatum, 3-7 feet, Zones 4-8) is a bold garden perennial that flowers from late summer to fall and commonly inhabits moist prairies. The wild form is useful in big garden borders alongside ornamental grasses, hardy hibiscus, and tall perennial sunflowers. Tamer options also exist. ‘Phantom’ is a maculatum hybrid that only reaches 4 feet tall and produces lots of puffy purplish-pink flowers on tidy, well-branched plants. They grow well in average to moist soil, full sun, and are a favorite of butterflies but not deer.

Muhly Grass

Beautiful pink Muhlenbergia capillaris has magnificent fall grass plumes.

The prairie-native muhly grass (Muhlenbergia capillaris, 2-3 feet, Zones 6-9) is a tough, fall-blooming grass, with cloud-like puffy seed heads or rose or pink. An excellent variety is Regal Mist® with its ruby-pink clouds of grass plumes in fall that are still showy into winter. It reaches 4-feet tall, does well in any well-drained soil, and is drought tolerant. Plant muhly grass in full sun. Even though it is a grass, it is deer resistant.

Another fall grass for prairie gardens is Proven Winners’ Prairie Winds^® ‘Blue Paradise’ little bluestem. The neat, upright bunch grass just reaches 3-4 feet and has steely blue blades that turn purple in fall. Leave it uncut for winter interest.

Sedums

Rock ‘N Round™ ‘Popstar’ Sedum looks pretty along the edge of any fall bed.

There are some prairie sedums, though few to none are commonly available to gardeners, so I am improvising with a favorite garden variety. Rock ‘N Round^™ ‘Popstar’ (10-12 inches, Zones 3-9) is an excellent mounding stonecrop with loads of pink flowers late in the season, and purplish-gray leaves the rest of the growing season. Low-growing, fall-blooming stonecrops like Rock ‘N Round look beautiful when planted along the margins of a prairie-inspired garden. The succulents have thick leaves that hold water and are tolerant of hot, dry spells. Most new varieties have fancy leaves that are beautiful all season long. Sedums are generally deer resistant.

When planting any of these fall beauties, dig a hole twice as large as the roots, incorporate a few handfuls Black Gold Garden Soil into the backfill. Then plant your perennial. Follow up by adding a quality slow-release fertilizer.

Adding just a couple of these pretty fall flowers to your late-season display will give it a boost. Hardier varieties can be planted in the garden now, or save a few for your need-to-get spring list.

How to Revive Midsummer Garden Flowers

The neverending summer heat, especially here in the Midwest, stresses garden flowers and potted plants as well as the people that care for them. Formerly vibrant containers of calibrachoa, petunias, marigolds, gaillardia, salvias, zinnias, and other annuals, can start to look pretty drab by August without intervention. Plenty of perennials will also pop back and either rebloom or form attractive foliage. Some gardeners may think, “Who wants to go out in the nineties and work on plants past their prime?” Don’t make this mistake. If you give certain garden flowers a little reviving boost, they will look great until fall.

Start by Avoiding the Heat

Morning is the coolest time of the day to work in the garden.

Care for your flowers in comfort by avoiding midday temperatures. When you are at ease, so are your garden plants. Go outside from early to mid-morning when it is coolest. Drink a glass of icy water before going out, and keep another on hand outdoors. Decide how long you can stay in the hazy, humid jungle before feeling overheated. For me, this usually turns out to be for an hours from 8:00 to 9:00 AM, and no longer, since this is all I can tolerate at one time. On the hottest days, I also use an ice pack around my neck, which is a big help. These are easy to find online and well worth the money.

Trimming Back and Deadheading Annuals Midseason

When petunias start to become leggy and flower less, cut stems back by one third to three quarters to encourage a new flush of flowers. (Images by Jessie Keith)

Trim Midseason – Most annuals can be brought back to their former glory with only a little bit of work. Whether in containers or the garden, many need to be cut back, especially calibrachoa and petunias. Cut leggy stems back by one third to three quarters, and they will pop right back. (Click here for a detailed overview of cutting back petunias and calibrachoa.)

The need to trim also holds true for marigolds, zinnias, verbena, salvias, and annual dianthus, as a general rule, only cut these back by one quarter to one third. They should bounce back quickly and look beautiful for the rest of the season. Follow up with selective deadheading as needed.

For taller garden annuals, such as cosmos and amaranths, cut them back by half, and in only one week or two, they start putting out new flower stems. The plants will look bushier and bloom once more.

Deadhead Regularly – For compact marigolds, tall zinnias, dahlias, annual salvias, and flowering geraniums, only remove the spent flowers. Remove larger dead flowers one by one and shear off lots of smaller spent blooms. You may lose a few buds in the shearing process, but you will gain loads more.

Pinch off coleus buds. If you let them flower, the attractive foliage will suffer, and the plants will lose their good looks.

Pinch Buds Regularly – There are foliage plants that also require regular deadheading to keep their leaves looking beautiful. Coleus is the most popular garden annual that suffers from flowering. When plants flower, they put energy towards blooms rather than pretty leaves, and the plants instantly start to lose their good looks. So, remove their flower buds on sight.

Trimming Back and Deadheading Perennials Midseason

When blanket flower goes to seed, it loses its beauty, but it will look beautiful again by simply removing the old flowers and giving it a light trim. (Images by Jessie Keith)

Perennials are a bit different. Quite a few will also rebloom, but some won’t, so it pays to know what will provide more flowers with trimming and deadheading and what won’t. With that said, even perennials that don’t rebloom will respond well to trimming by providing an attractive flush of new foliage, which helps keep gardens looking their best. Here are some reliable rebloomers.

Blanket flower (Gaillardia x grandiflora) has pretty, colorful daisy flowers that turn to round, tan seedheads after blooming. Keep these seedheads cutback. Another method is to wait until they are almost finished blooming and then shear the plant back by one third.

Catmint and perennial salvia (Nepeta hybrids and Salvia hybrids) send out long stems with violet-blue or purple flowers. Over time, those of many varieties tend to sprawl. (One exception is Cat’s Pajamas, which has tidy, upright stems of flowers.) Eventually, catmints stop blooming heavily, and their stems get ratty looking. At this point, cut back to the base clump, and new stems will start growing and flowering in a matter of weeks.

The spent flower stems of catmint should be cut all the way back. The small rosette of fresh green foliage that is left should grow and rebloom, if watered and fertilized. (Images by Jessie Keith)

Coneflowers (Echinacea species and hybrids) respond well to more than one method of pruning. One can wait for them to almost complete flowering and then cut the whole plant cut back–one third for the smaller varieties and one half for the taller ones reaching 3 feet or more. New flower buds should appear in just a couple of weeks. Another method is to selectively deadhead as each flower dies. Towards the end of the season, be sure to allow plenty of flowerheads to dry. Their seeds are an excellent food for finches and other songbirds.

Hardy geraniums (Geranium spp. and hybrids) vary in their ability to rebloom. Newer varieties that rebloom need to be cut back by one third after their flowers start to wane. Common garden varieties, such as blood geranium (Geranium sanguineum), will not rebloom. Still, their old foliage needs to be cut back by three quarters to encourage new growth, which forms a pretty green mound of leaves that turn red to orange-red in fall.

Ox-eye daisy (Heliopsis helianthoides) is a favorite of mine that reaches 5 to 6 feet tall if you let it. But, if you cut the summer bloomer back by half in late spring, it will produce a shorter plant with better branching and more flowers. Mine bloom from July to August. Occasional light deadheading will encourage further blooms. Unlike the closely related black-eyed Susan, which spreads rapidly by seeds, ox-eye daisy does not aggressively self-sow.

Tall garden phlox (Phlox paniculata varieties) is another flower that responds well to being cut back by one third after the first flowers of the season start to die away and going to seed. A quick trim will have them producing many bright flowers on new stems in no time. I have lots of lavender, pink, and white phlox that get up to 3 feet tall. All reliably rebloom after being cut back.

By removing the brown, spend flower stems of this yarrow ‘Moonshine’, the clump’s silver foliage can shine through, and new flowers emerge. Images by Jessie Keith)

Yarrow (Achillea hybrids) have rosettes of feathery leaves that send up tall stems of blooms in early to midsummer summer. After the display of flowers stop, cut the plants back by two thirds, and new flowering stems will quickly appear. Newer varieties tend to be the best rebloomers.

Tickseed (Coreopsis species and hybrids) come in lots of varieties, but all produce many daisy flowers of yellow, orange, or rose in summer. Some of the most common are those of threadleaf coreopsis (Coreopsis verticillata), which have lacy leaves, lots of small, bright daisies, and do well in full sun. Depending on the variety, plants can reach 12 to 32 inches. By midsummer, they will have gone to seed. Shear them back by one third to produce a new wave of blooms by late summer.

Reblooming daylilies (Hemerocallis hybrids)- There are many reliable reblooming daylilies on the market. The most reliable for all-summer bloom that I have found is is ‘Happy Returns’. It has bright yellow flowers and reaches just 2 feet tall. After it has stopped flowering in early to midsummer, either remove all of the spent flower stems and selectively remove any dead or dying foliage, or cut the clump back by 1/3 to encourage new flowers. Either way, they will rebloom and look great in just weeks.

All these perennials are drought tolerant, once established, and loved by butterflies. Aside from tall phlox and daylilies, they are deer resistant as well.

Increase Care After Pruning

All plants, whether in pots or the soil, require regular water, and all need to be fertilized generously with a slow-release fertilizer for the best results. Top-dressing beds and containers with a little Black Gold Garden Compost Blend can increase fertility and soil water-holding capacity, so it also helps. The addition of Black Gold Just Coir to containers will increase their ability to hold water, which can reduce the need to water. Keep the care up, and you will be pleased with the final results. Time to get to work!

We encourage you to watch the following video by my daughter that details how to trim back daylilies, salvia, and more!

Author’s note: Do not cut back Hosta leaves to promote new ones. Unlike other perennials, the new small leaves that would appear, are next year’s leaves and will weaken the plant for the following spring.

Articles

Piece of Cake Perennials

Fragrant Shrubs

Annual and Perennial Garden Flowers

Violets and Wildlife

Six Beautiful Native Violets for the Garden

Starting Native Violets From Seed

Other Violet Uses

Daylilies For Forcing

How to Force Daylilies

Perennial Seed-Starting Materials

Grow Lights and Fixtures

Seed Starting Trays and Labels

Seed Starting Mix, Fertilizer, and Waterer

Perennial Seeds

Perennial Seed-Starting Steps

Read Your Seed Packets

Gather Your Materials and Prepare Seedling Area

Prepare Your Planting Trays

Sow Your Seeds

Label, Water, Cover

Seedling Care

Harden Seedlings Off

Planting

What Perennials to Grow from Seed

Purple Coneflower (Echinacea purpurea)

Blanket Flower (Gaillardia x grandiflora)

Salvia (Salvia nemorosa)

A Short History of Garden Gladiolus

Planting and Caring for Gladiolus

Gladiolus to Grow in Gardens

More Gladiolus Notes

Lenten Rose

Virginia Bluebells

Lungwort

Columbine

Barrenwort

Flowering Perennial Groundcovers for Southern California

Fall Garden Flowers with Prairie Origins

Fall Asters

Goldenrod

Sunflowers and Oxeye Daisies

Joe-Pye-Weed

Muhly Grass

Sedums

Start by Avoiding the Heat

Trimming Back and Deadheading Annuals Midseason

Trimming Back and Deadheading Perennials Midseason

Increase Care After Pruning

Author’s note: Do not cut back Hosta leaves to promote new ones. Unlike other perennials, the new small leaves that would appear, are next year’s leaves and will weaken the plant for the following spring.