Sweetclover Seed Sources
- Albert Lea Seed House
- Digital Raingarden
- Justin Seed Company
- Landmark Seed
- Lorenz O.K. Seeds
- Northstar
- Pogue Seed Company, Kenedy, TX 78110 (phone # 830-583-3456)
- Rex's Seed Company /
- SBE
- Seeds Of Change
- Sharp Bros. Seed Co.
- Snow-pond
- Stover Seed Company
- USDA Natural Resources Conservation Service