ver the years, DeWitt Seed Company has formed strong relationships with the major seed producers:

Syngenta
(formerly Rogers / Northrup King)
Hollar Seeds
Rupp Seeds
SunSeeds
Crookham Company
Seminis Vegetable Seeds
(formerly PetoSeed and Asgrow Companies)
Harris Moran
D. V. Burrell Seed Growers Co.

...and other local and regional seed producers.