Corn is actually a robust annual grass with male flowers in the tassels and female flowers forming ears lower down - turning into the corn we eat! It is a cultigen derived from wild maize and originates in Central America.
Corn is a heavy feeder, and loves to get extra nourishment from compost prior to planting (prep the soil) and at about knee-high growth stage. Plant seed about 1" deep, 6-8" spacing in rows. Hilling rows at the 8" growth stage helps control weeds and provides stalk support.