| Brevant | Corteva Agriscience | 7398 Queen’s Line, PO Box 730, Chatham, ON N7M 5L1 | 800 265 9435 |
| CROPLAN | Winfield United | 3850 concession 15, St. Isidore, ON K0C 2B0 | 613-323-6846 |
| De Dell | De Dell Seeds Inc | 7095 Century Drive, Melbourne, ON N0L 1T0 | 519-264-2676 |
| DEKALB | Bayer CropScience Inc. | 160 Quarry Park Blvd, Calgary, AB T2C 3G3 | 888-283-6847 |
| DLF | DLF Canada Inc. | 3043 County Road 2, Port Hope, ON L1A 3V5 | 705-878-9240 |
| Horizon | Horizon Seeds Canada Inc. | 531 Bostwick Rd., Courtland, ON N0J 1E0 | 519-842-5538 |
| Maizex | Maizex Seeds Inc. | 4488 Mint Line, R.R.#2, Tilbury, ON N0P 2L0 | 877-682-1720 |
| NK Brand | Syngenta Seeds Inc. | 15910 Medway Rd., R.R.#1, Arva, ON N0M 1C0 | 800-756-SEED |
| Pioneer | Pioneer Hi-Bred Canada Comp | Box 730, 7398 Queens Line, Chatham, ON N7M 5L1 | 800-265-9435 |
| PRIDE Seeds | AgReliant Genetics Inc. | P. O. Box 1088, 6836 Pain Court Line, Chatham, ON N7M 5L6 | 519-354-3210 |
| Saatbau | Saatbau Linz | 201 rue st louis . 412, St Jean/Richelieu, QC J3B 1X9 | 514-609-0881 |
