Optimum Corn Planting Dates Are Later ‘Up North’

Optimum Corn Planting Dates Are Later ‘Up North’

Joe Lauer, University of Wisconsin-Madison

This article first appeared May, 2013

Optimum corn planting dates vary with latitude. The northern Corn Belt is limited by heat units during the growing season, especially during the spring when cool, wet soils delay planting and during the fall when early frosts kill plants prematurely. Within Wisconsin we often find that optimum corn planting dates are later ‘up-north’ than in southern Wisconsin and that yield loss accelerates more quickly resulting in a shorter planting window.

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