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Frequently Asked Questions

What is Sun Gro Horticulture?
Black Gold is one of several premium retail products made by Sun Gro® Horticulture. Over the last 80 years Sun Gro has become the leading supplier of superior quality peat moss and peat- and bark-based horticultural growing products to North America, serving both professional and retail markets. In fact, Sun Gro has the proud distinction of being the number one supplier to the top 100 commercial growers in North America, shipping over 70,000 truckloads of product annually.

What is the Canadian Sphagnum Peat Moss Association (CSPMA)?
Founded in 1988 to promote the benefits of peat moss to horticulturists and home gardeners throughout North America, the Canadian Sphagnum Peat Moss Association is comprised of 18 peat moss producers and marketers representing 95 percent of Canada’s total production.

What is OMRI?
The Organic Materials Review Institute (OMRI) is a national nonprofit organization that determines which input products are allowed for use in organic production and processing. OMRI Listed—or approved—products may be used on operations that are certified organic under the USDA National Organic Program.

What is the Mulch & Soil Council?
Founded in 1972 as the National Bark Producers Association (NBPA), the current Mulch & Soil Council has become the nonprofit trade group of all producers of horticultural mulches, consumer potting soils, and commercial growing media.

What is Black Gold’s Controlled Release Fertilizer?
Several Black Gold® potting soils use controlled release fertilizer formulations made with the highest quality nutrients. Our homogenous granules are encapsulated in a multilayer polymer coating. The polymer coating controls the release rate, thereby allowing a slow, continuous diffusion of dissolved nutrients to the root zone. As the soil warms up, the release rate increases consistently with the plant’s growth rate and nutrient consumption. The premium NPK formulations have a reliable release profile, which is unaffected by soil type, soil pH, moisture or microbial activity.

How do I know how much Black Gold to add?

For this, we turn to the amendment application formula. For larger loose-fill Black Gold amendments, you may want to calculate how much is needed for a given area in the garden. The following formula determines a given amount in cubic yards over a defined area:

([area to cover] ft2 x [depth in inches desired] x 0.0031 = ___ yd3).

Example: If you wanted to cover a 20-square-foot area with 2 inches of compost, the result would be: 20 ft2 x 2 inches of compost x 0.0031 = 2.48 yd3.

While we have made every effort to ensure the information on this website is reliable, Sun Gro Horticulture is not responsible for any errors or omissions, or for the results obtained from the use of this information. All information in this site is provided “as is”, with no guarantee of completeness, accuracy, timeliness or of the results obtained from the use of this information.

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