Had this advertisement to sell or lease Iowa hemp mills. Via Iowa Hemp For Victory:
Iowa hemp mills for sale or lease according to the Waterloo Daily Courier were located in the following Iowa towns:
Algona
Boone
Britt
Eagle Grove
Grundy City
Hampton
Humboldt
Iowa Falls
Mason City
Rockford
Traer
Farmers were forced by law to grow hemp for the World War II effort. This video from the Library of Congress shows more of our farming history here in Iowa.
WeedPress: The Paper Trail 