With some “late” planting or replanting some are concerned already about whether or not we might be caught by a fall frost before maturity without a change in maturity selection. Not to worry. The corn plant has the ability to adapt to the later planting by advancing more rapidly through the growth stages. Work done at Purdue and Ohio State by graduate students of Bob Nielsen and Peter Thomison, shows that the number of growing degree days (GDD) needed from planting to maturity decreases by about seven GDDs per day of delayed planting. So even a hybrid planted on May 30 needs about 200 less GDDs to achieve maturity than a hybrid planted on May 1.