Ames
Ames Corn Research
1203A Airport Road
Ames, IA 50010

Anamosa
Monsanto Company
Old Dubuque Road – Box 427
Anamosa, IA 52205

Ankeny
Monsanto Company
3302 S.E. Convenience Road
Ankeny, IA 50021

Aplington
Monsanto - Parkersburg Foundation
18739 Highway 57
Aplington IA 50604

Atlantic
Monsanto Company
53751 650th Street
Atlantic, IA 50022

Beaman
Monsanto
410 Center St
PO Box 166
Beaman, IA 50609

Boone
Monsanto
1159 S Ave
Boone, IA 50036

ASI - KRUGER-DIKE
33730 160th Street
Cedar Falls, IA

Cedar Rapids
DeKalb
3500 F Ave, NW - Suite 1
Cedar Rapids, IA 52405

Clarion
Monsanto
617-623 Central Ave. West
PO Box 108
Clarion, IA 50525

Dayton
Monsanto
2476 370th St
PO Box 408
Dayton, IA 50530
Tel: 515-547-2550
Fax: 515-547-2552

Grinnell
Monsanto
721 Hwy 6 E
PO Box 773
Grinnell, IA 50112

Monsanto Company
Iowa Foundation
757 Hwy 6
P.O. Box 743
Grinnell, IA 50112

Huxley
Monsanto Company
1551 Highway 210
Huxley, IA 50124

Independence
2346 Henley Ave             
Independence, IA

Independence 
2332 Henley Ave             
Independence, IA

Muscatine
Muscatine Plant
2500 Wiggins Road
Muscatine, IA 52761
Tel: 563-263-0093
Fax: 563-262-5683

Parkersburg
Monsanto
18739 Highway 20
Aplington, IA 50604-9602
Tel: 319-347-6633
Fax: 319-347-2720

Spencer
Monsanto
605 11th St SW
PO Box 244
Spencer, IA 51301
Tel: 712-262-1804
Fax: 712-262-1806

Storm Lake
DEKALB/ASGROW
6135 S. Hwy 71
PO Box 779
Storm Lake, IA 50588

Williamsburg
Holden's Foundation Seeds
503 South Maplewood Avenue
Williamsburg, Iowa 52361