| Aris Horticultural Services | 800-232-9557 | G.S. Grimes Seed Company | 800-241-7333 | |
| Aris Horticultural Services - Canada | 519-326-6121 | Harris Seed | 800-544-7938 | |
| Ball Horticultural Company | 800-879-2255 | Henry F. Michell Company | 800-422-4678 | |
| Ball Superior Ltd. | 905-696-9005 | McHutchison Horticulture | 800-943-2230 | |
| BFG Plant Connection | 800-883-0234 | Mid Atlantis Plant Company | 302-366-0349 | |
| Bob Soos Company | 269-795-7890 | Park Seed Wholesale (JJPA) | 800-845-3366 | |
| Eason Horticultural Resources | 800-214-2221 | Richard D. Smith | 201-493-9500 | |
| Express Seed Company | 800-221-3838 | Syngenta Horticulture Sales | 800-454-8159 | |
| Florasource Ltd. | 949-498-1131 | Vandenberg Bulb Company | 800-955-3813 | |
| Foremostco | 800-421-8986 | Vis Seed | 626-445-1233 | |
| Fred C. Gloeckner & Company | 800-345-3787 | Wehop | 800-669-6480 | |
| Germania Seed Company | 800-380-4721 | W.H. Milikowski | 860-684-1595 | |
| Griffin Greenhouse Supply | 800-732-3509 |