Articles

Favorite Flowering Ground Covers

‘Shell’Pink’ and ‘Orchid Frost’ lamiums look lovely side-by-side.

If you have a garden area that needs filling in, whether along a slope, between plants, or beside stone steps or rocky retaining walls, there are many beautiful perennial groundcovers for the job. They range from ones that do well in hot, dry areas to others that like moist shade.  I have chosen groundcovers that have beautiful leaves as well as flowers, which do not overwhelm surrounding plants and are easy to grow.

Flowering Groundcovers for Full to Partial Shade

‘Orchid Frost’ is one of many pretty deadnettles for shady gardens.

Spotted Deadnettle (Lamium maculatum, Zones 3-8): One of my favorites for shade is named spotted deadnettle, or simply deadnettle, even though it has no prickly nettles.  I have had several varieties in my shade garden for years. The early summer flower stalks are about 7 inches tall, rising over 4-inch-tall plants that spread several feet across. There are lots of varieties with variously spotted leaves and blooms of purple, pink, or white that are visited by bees. My favorite varieties include ‘Orchid Frost’ with lavender flowers and beautiful silver leaves, ‘Aureum‘ with bright pink flowers and white-striped gold leaves, Shell Pink‘ with palest pink blooms, and ‘White Nancy’, which has white flowers and silvery leaves. Lamium is deer-resistant, spreads gently, and is easily divided and transplanted. Plant it along shaded bed edges or allow it to cascade from the side of a shaded container garden. Lamium likes full to partial shade, and moist, well-drained soil.

Fragrant sweet woodruff flowers and plants look attractive in shaded gardens.

Sweet Woodruff (Galium odoratum, Zones 4-8): Another partial- to full-shade groundcover is European sweet woodruff, which also has the benefit of being an herbal plant used to flavor May wine in Europe. It has clusters of starry white flowers in the spring and whorled, star-shaped leaves; both are fragrant, but it’s the flowers that are used to flavor the wine. (Click here for a May wine recipe.) Sweet woodruff is about 8 inches tall and gently spreads around trees and shrubs.  It likes moist, well-drained soil and is deer resistant!

Wild ginger creates mats of attractive foliage through the growing season.

Wild Gingers (Asarum spp., Zones vary): There are many wild gingers with lovely ground-covering foliage and interesting beetle-pollinated spring flowers. The popular native species is Canadian wild ginger (Asarum canadensis, Zones 2-8). Its medium-green, heart-shaped leaves look very pretty on bed edges or to hold shaded garden banks. Chinese wild ginger (Asarum splendens, Zones 6-8) is more ornamental with its pointed, green leaves that have spectacular silver markings.  ‘Quick Silver‘ is the best variety. Small, three-petaled, purple flowers appear around the base of the plants in spring. It also does well in full to part shade.  Most Asarum reach 6 to 8 inches, like average well-drained soil, and are deer resistant.

‘Cutting Edge’ Tiarella has attractive spring flowers and lovely leaves. (Image thanks to Proven Winners)

Foamflower (Tiarella spp.): These pretty native perennials have attractive, lobed foliage and spires of foamy flowers that appear in late spring. The flowers may be ivory or pink and attract both bees and butterflies. The pretty clumps of ornate leaves spread over time. Try the new Proven Winners variety ‘Cutting Edge’, which has spectacular green, maple-shaped leaves with red venation. Provide foamflower with full to part shade, and moist, well-drained soil amended with fertile organic matter, such as Black Gold Natural & Organic Garden Compost Blend. In fact, this amendment will create a good soil foundation for all of the shade-loving groundcovers mentioned.

Flowering Groundcovers for Full to Partial Sun

Creeping thyme doubles as an herb and groundcover.

Creeping Speedwell (Veronica prostata, Zones 4-8): Grow this creeping groundcover along a border edge or in a rock garden. The stunning variety, ‘Aztec Gold’, has gold leaves with violet-blue flowers in the early summer.  It reaches 6 inches tall, is heat tolerant, and needs moderate moisture. Deer don’t like it but bees and butterflies do.

Creeping Thyme (Thymus serpyllum, Zones 4-8): This easy garden herb is one of my favorites. It does well between paving stones or cascading down rock walls. The fragrant leaves are tiny plants reach 2-inches-high. The spreading mats have little summer flowers of purple, bright pink, or lavender, depending on the variety you buy. Bees love the blooms! Check out ‘Elfin’ with purple flowers, ‘Annie Hall’ with pink flowers, and ‘Silver Posie’, which has white-edged leaves and lavender flowers. The fragrant leaves can be used in cooking. Thyme needs full sun, very well-drained soil, and is drought-tolerant once established. Like most plants in the mint family, it is also deer resistant.

Creeping phlox is perfect for garden edges and slopes (‘Emerald Blue’ is at the far left, and ‘Candy Stripe’ is at the far right)

Stonecrop (Sedum spp., Zones vary): For hot, dry, sunny, areas nothing can beat, low-spreading stonecrops.  Many have beautiful, succulent leaves, as well as starry flowers that attract bees and butterflies. It is very easy to pull up a piece and replant it to help fill in an area quickly. Some good varieties are the 2-3 inches tall ‘John Creech’ (Sedum spurium ‘John Creech, Zones 3-9) with pink, summer flowers, SunSparkler® Wildfire (Zones 4-9) that has red leaves edged in rose as well as pink flowers in the late-summer, and ‘White Diamond’ (Sedum pachyclados ‘White Diamond’, Zones 5-9) with blue-green rose-shaped leaves and white summer flowers.  The broad-spreading ‘Angelina’ (Sedum rupestre ‘Angelina’, Zones 5-9) is a popular variety with gold spiky foliage and yellow summer blooms.  Sedums are drought-tolerant once established.

Creeping Phlox (Phlox subulata, Zones 3-9): This has some of the most beautiful flowers of all the groundcovers and blooms for up to 4 weeks in the spring.  It averages 5 inches tall and spreads quickly. Plant creeping phlox in open, sunny areas along slopes or retaining walls, in front of shrubs, or in rock gardens where they will get full sun and well-drained soil.  Look for the colorful varieties ‘Scarlet Flame’ with red-eyed rose-pink flowers, ‘Emerald Blue’ with pale lilac-blue flowers, and ‘Candy Stripe’, which has pink flowers edged in white.  Creeping phlox is deer resistant.

Snow-in-Summer can take heat and drought!

Snow-in-Summer (Cerastium tomentosum, Zones 3-7): gardeners with hot, dry, sunny spots that need a flowering groundcover should grow snow-in-summer. It creates a broad, spreading mat of silver leaves that erupt with cascades of white flowers in the summer. Try the more compact variety, ‘Yo Yo‘. It is beautiful! Site it as you would creeping phlox. Bees and butterflies love the flowers!

These easy groundcovers will help to provide needed in sweeps across your garden. Buy a few to fill in bare areas, and you will be glad you did.

Groundcovers to Avoid

It is important to note that there are some popular groundcovers to avoid because they are invasive and have become an ecological problem in wild areas. These include groundcover periwinkle (Vinca minor and Vinca major), wintercreeper (Euonymus fortunei), Bugleweed (Ajuga reptans), Japanese spurge (Pachysandra procumbens), and worst of all, English Ivy (Hedera helix). English ivy is a tree-killer in zone 7 or warmer (click here to learn more). The evergreen types are truly the worst because they smother native spring ephemerals and other natives along the forest floor. Avoid planting them, if you can.

What are Shade- and Sun-Loving Groundcovers for Florida?

Texas Frogfruit is a native groundcover that feeds bees and butterflies.

“Can you tell me, please, which ground cover plants do well in SW Florida, in a shady and wet location, as well as an area that is drier and gets sunshine most of the day!” Question from Colleen of Englewood, Florida

Answer: There are several groundcovers, for wet and dry areas, that are suited to your Zone 9 landscape.

Florida Groundcovers for Moist Shade

  • Ogon Golden Variegated Sweet Flag (Acorus graminius ‘Ogon’): This evergreen, grassy perennial will tolerate soil moisture, shade, and brings sunny yellow color to shaded spots.
  • Evergold Sedge (Carex hachijoensis ‘Evergold‘, Zones 5-10): Evergold produces moppy clumps of grass-like blades of green striped with gold. The plants will tolerate both moisture and shade. 
  • Snow Drift Caladium (Caladium hybrids, Zones 9-11): All Caladiums are beautiful, but snowdrift is extra elegant and brightens shady spots. They will grow well in moist soils and shade.
  • Fizzy Mizzy Sweetspire (Itea virginica Fizzy Mizzy): These compact shrubs grow well in partial shade, boggy soils, and are natives that feed wildlife. White, fragrant, spring flowers feed bees and butterflies and the fall leaves turn shades of russet-red.

Florida Groundcovers for Dry Sunshine

Texas Frogfruit (Phyla nodiflora, Zones 8-11): This semi-evergreen groundcover reaches 3-6 inches and produces small pinkish-white flower clusters that feed bees and butterflies. The flowers may appear from late spring to fall. It is a Florida native that can tolerate sunshine and partial sun as well as moist and dry soils.

Asian Jasmine (Trachelospermum asiaticum ‘Minima), Zones 8-11: The evergreen Asian jasmine is compact, slow-growing, and it has deep-green, glossy leaves that are bright red when they first emerge. Throughout the growing season, it produces small, white flowers that are fragrant. Established plants tolerate drought and light frost.

I hope that this list gives you some ideas.

Happy gardening!

Jessie Keith

Black Gold Horticulturist

Why Aren’t My Heirloom Tomatoes Producing Fruit?

“My heirloom tomato plant is growing beautifully. However, it has not one tomato on it, while another bush, under same growing conditions, is more prolific though it still does not have ample tomatoes. Is there something I am doing/not doing correctly? During the long summer days the beds do get over 6 hours of sun a day, as the days are getting shorter they are down to about 51/2 right now. I use no chemical pesticides.  I only have two tomato plants and check them daily.” Question of Ann Marie of Holbrook, New York

Answer: Several things can keep otherwise healthy looking tomato plants from producing ample good fruit. These are 1)  imbalanced nutrition and 2) too little sunlight. Tomatoes are heavy feeders that need high nutrition, regular watering, and at least eight hours of direct sunlight for good fruit production. All of these are necessities.

Fertilizer is easy. Choose a fertilizer formulated for tomatoes and feed your plants regularly, as recommended on the package. Adding additional bone meal is also helpful in reducing the chance of blossom end rot, a common nutrient deficiency of tomatoes.

Sunlight may not be as easy to provide, depending on your yard, but eight or more hours are needed for fruit-producing vegetables, like tomatoes, peppers, cucumbers, and squash. More is even better. I plant my veggies where they can get all-day sun for maximum output.

If you plant only a couple of tomatoes, try growing them in large containers and moving them to a sunnier part of the yard. This will enable to provide them with more sun and better control their soil, nutrients, and water. Black Gold Natural & Organic Potting Mix is a great potting mix choice. Please watch the video below to learn more about how to grow great tomatoes in containers.

I hope that these growing tips help!

Happy gardening,

Jessie Keith

Black Gold Horticulturist

I Need Flower Design Help for My Sunny Kentucky Garden

“I have a large area to plant flowers in that gets full sun but I am not sure what design and mixture to use.” Question from Karen of Cannon, Kentucky

Answer: Most garden flowers grow best in fertile soil with excellent drainage. I recommend working up your soil to increase aeration and adding a fertile blend of compost (Black Gold Garden Compost Blend) and peat moss (Black Gold Peat Moss) to ensure they get off to a great start. Adding a slow-release fertilizer formulated for flowers will also help them grow and perform at their best. It may also be wise to get your soil tested for pH. The University of Kentucky does soil testing.

Creating Flower Beds

As far as design, the finest flower gardens edge the periphery of key yard spaces, such as home foundations, fencelines, patios, shrub borders or other signification structural areas of your yard. Flower borders such as these can be designed in straight lines, which provide a classic, formal look, or sweeping curves that give a garden space a more full, curvaceous look.

Finishing Flower Beds

Once you have laid our your bed lines, edge them well. A clean bed edge acts as a frame for your garden. (Click here to read more about different bed edges). A layer of fine mulch will also make your flower garden look professional. (Click here to learn more about different garden mulches.)

Flower Design

I recommend planting taller perennials towards the back or centers of the flower garden while leaving space for ground-covering perennials and colorful annuals towards the front of the beds. It is also essential to consider flower color and bloom time when designing with flowers. Dot the garden with flowers in complementary colors that are pleasing to your aesthetic preferences. Then consider bloom time: choose bulbs and perennials for spring, flowers for early summer, and flowers for late-summer and fall. That way, your garden will never look dull and colorless. Everblooming annuals will extend the floral effect.

Choose flowers that are best suited for the heat of your Kentucky summers. Hellebores and bulbs are great for the early season; salvias, daylilies, baptisia, and perennial geraniums are perfect for early summer; coneflowers, perennial blanket flower, tall phlox, and black-eyed-Susans are great for midsummer; and great fall perennials include goldenrods, asters, and Japanese anemones. (Click here to read more about the best garden asters.) Bold, ornamental, perennial grasses also look great in perennial borders.

I hope that this helps!

Happy gardening!

Jessie Keith

Black Gold Horticulturist