- Black Gold
- Coast of Maine
- Codeage
- Cyan Design
- Elements
- Espoma
- FoxFarm
- Garden Elements
- Healths Harmony
- Hoffman A H Inc/Good Earth
- House Plant Shop
- Jonathan Green
- Michigan Peat Company
- NativePath
- Natural Guard
- Nature's Elements
- Nearly Natural
- NOW Foods
- PITT MOSS
- Premier Horticulture Inc
- Safavieh
- Slickblue
- Sun Bulb
- SunGro Black