Get delicious, healthy popcorn fresh from your garden. Some varieties can even be used for colorful decorations. Sow popcorn around the middle of May. Sow about 1/2 inch deep in hills of 3 to 4 seeds. Harvest in late August or September when the kernels on the ears are dry and glossy and the stalks and leaves are completely dry. Let dry in an airy place. When completely dry, husk, strip, pop and enjoy.