Corn does best when direct sown 1” deep, spaced at 18” centers. Plant when danger of frost has passed, after soaking seed overnight. For optimal pollination plant in blocks of 100. Sweet Corn can be slow growing at first due to the shrunken kernels having less energy to get started. Cover with row cover in cool weather or plant later in the spring when soil temperature has reached 60° F.
Harvest for seed when stalks are brown. Pick cob, fold husk back, and leave inside to dry completely. Remove kernels by rubbing two cobs together, or by hand. Test for dryness with a hammer; dry kernels shatter and moist ones squish. Isolate from other corn by 1/2 – 1 mile or two weeks for time isolation.