Mustang Seeds

1021 SW 10th Street
PO Box 466
Madison SD 57042

P: 605-256-6529
F: 605-256-6521


SINCE 1963


Ray Schultz started a new venture in Madison, South Dakota. In 1963, he and his wife, Marlys, developed the Mustang Seed brand after purchasing a farm and Domestic Seed and Supply Inc.


As row crops became more adapted for western Corn Belt states, Ray Schultz added seed corn and soybeans to Mustang Seeds’ product line. The company also expanded into additional ag retail services, including fertilizer.


Ray and Marlys Schultz’s youngest son, Terry, joined Mustang Seeds after graduating from college. After Roundup® Ready soybeans were introduced in 1996, Mustang Seeds built a large-scale, state-of-the-art soybean cleaning plant in 1998 in Madison, South Dakota.


In 2008, Mustang acquired Coyote Brand seeds and began to serve Coyote Seed customers—old and new—with top-quality alfalfa, small grain, and specialty seeds.


Mustang Seeds divested its ag retail division in 2010 to focus solely on seed. The company expanded its distribution network, increasing its trade territory to the Canadian border. In 2012, they opened a northern distribution warehouse near Casselton, North Dakota. As seed treatments became a big part of the seed industry, Mustang Seeds added on-demand seed treatment centers in Casselton and Madison. Mustang Seeds continued to thrive and expanded in 2017 to include Red Horse Crop Insurance.


Mustang enters a partnership with GDM that secures top genetics and breeding for Mustang Seeds. A new company, Red Horse Seed Production, Inc., is created to handle operations for and distribution of all seed products.


Mustang Seeds celebrates 60 years and renews our commitment to serve American farmers as a trusted seed and trait partner. Toward that mission, in June of 2023 Midland Genetics became part of Mustang Seeds under the GDM family of brands. This new alignment allows Mustang to expand our territory into Kansas and Missouri and helps us move toward exciting new things.