Answer: Corn takes a long season to grow, even in hot climates. Some gardeners start checking for ripeness three weeks after the silks appear. If you don't remember when the silks appeared, you can feel the ears through the husks to see if they seem full, with well-developed kernals. Or, you can pull back part of the husk and check for ripeness by piercing a kernal with your thumbnail. If a milky juice squirts out, they're ready to harvest. If not, pull the husk back up and wait a few days. Then check again.
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