Q.How much sun dose a corn plant need
How much dose a corn plate need
Corn needs 8 hours of direct sunlight. It is a real sun and fertilizer hog in order to produce more than one ear per stalk. Depending on your planting, you may need to hand-pollinate your corn. Here is a how-to for pollinating corn: https://www.gardeningknowhow.com/edible/vegetables/corn/corn-pollination-how-to-hand-pollinate-corn.htm
Full sun is needed to grow Sweet Corn.