Schlessman Seed Company Share: Agriculture Schlessman Seed Company Visit Website 11513 US Rt. 250 Milan, OH 44846-9758 (419) 499-2572 (419) 499-2574 (fax) www.schlessman-seed.com Facebook About Map About Founded in 1915, Schlessman Seed Company is the largest seed production company based in Ohio. We produce and sell hybrid corn, popcorn, sweet corn, soybeans and wheat. What's Nearby? Distance: 5 10 15 20 25 50 mi.