- Skip's Seed Plant
- Smith Farms Seed Cleaning
- Smith Seed O Street Storage
- Smucker Seed
- Solomon Rapids Seed
- Sorensen Seed Co
- Souris River Grain Cooperative
- Southwest Seed Svc
- Southwest Seeds
- Spokane Seed Co
- Sprout Seed Svc
- Stahl Seed Cleaning
- Stalford's Seed Warehouse
- Stansbery Seed Co
- State Line Seed Co
- Stateline Processors
- Stein Seed & Cleaning
- Stengel Seed & Grain Co
- Sterling Seed Testing
- Stewart L Co
- Stockton Seed House
- Stoddard County Seed Svc LLP
- Stone Mill Farms Inc
- Storden Seed & Chemical Svc
- Summit Grounds Maintenance
- Superior Seed Cleaning Inc
- Swenson Seed Farm
- Synergene Seed & Technology
- T & W Seeds LLC
- Tabor Grain Co
- Tabor Grain Co
- Tabor Grain Co
- Taylor Seed Farms Inc
- Thiel Seed Svc
- Tillman & Deal Farm Supply
- Tobolt Seed
- Tobolt Seed
- Tomco Seed
- Tomco Seed
- Townsend Seeds Inc
- Treasure State Seed Co
- Triangle Farms
- Triple B Grain Cleaning Inc
- Twin Peaks Seed & Grain
- Tyler Cleaning Plant
- U Ap Mid South
- United Ag Svc
- Vaccaro Seed-California
- Valley Seed Co
- Van Dyke Seed Co
- Vance Ag
- W Brotherton Seed Co
- W Brotherton Seed Co
- Walla Walla Grain Growers Inc
- Walthall Farm Seeds
- Watson Seed Svc
- Weaver Seed Processing
- Weaver Seed Processing
- West Dakota Feed & Seed
- West Slope Seeds
- White Farms Inc
- Wilber's Seed Solutions
- Wilfred A Hamann Seed Plant
- Yawn Brothers Seed Cndtng
