|Founded||Coon Rapids, Iowa (1931)|
|Defunct||December 31, 2013|
|Headquarters||Slater, Iowa, United States|
Roswell Garst, Founder|
Charley Thomas, Founder
|Products||Hybrid and varietal seeds|
|Website||Garst Seed Company|
In 1931, Garst and Thomas Hi-Bred Corn Company was founded by Roswell Garst and Charley Thomas in Coon Rapids, Iowa, and was "instrumental in promoting the use of hybrid corn."  During the Cold War, Garst formed a relationship with Nikita Khrushchev and assisted the USSR in modernizing its corn production. 
In 1983, the company split up and Garst Seed Company was formed. 
In 1993, ICI sold off its North American assets, and Garst seed business became part of a new company called Zeneca. 
In 1996, Garst became part of Advanta Group, formed through the merger of Zeneca Seeds and VanderHave.  Zeneca became part of AstraZeneca and VanderHave was controlled by a Dutch farmer-owned co-operative called Cosun U.A. 
- Dinger, Ed. "Garst Seed Company, Inc". Retrieved 2010-12-29.
- Bijman, J. (2001). Advanta: Worldwide challenges. AgBioForum, 4(1), 34-39.
- Staff, Farm Futures. May 12, 2004 Syngenta Buys Garst Seed Company
- Karen McMahon (2013-03-13). "Syngenta's Garst Brand Ends in 2014". Farm Industry News. Retrieved 2014-03-22.