| Business | Phone |
| Triple A Seeds 1626 Burgess Ave, Carroll 51401 | (712) 792-4172 |
| Garst Seed Co 13423 Kittyhawk Ave, Carroll 51401 | (712) 792-5760 |
| Midwest Seed Genetics Inc 23751 Highway 30, Carroll 51401 | (712) 792-6691 |
| Renze Hybrid Seed Corn Co 27410 Kittyhawk Ave, Carroll 51401 | (712) 669-3301 |