Roots will need ample water but keep leaves and stems as dry as possible. Irrigate in basins or furrows. Harvest summer squash when they are still small and tender. You should be able to pierce rind easily with your thumbnail. Supersweet varieties of corn are actually sweeter than standard kinds and maintain their sweetness longer after harvest because of a gene that increases the quantity of sugar and slows its conversion to starch.
Corn grows best in deep, rich soils and good drainage is important.
Plant corn in full sun. Sow seed two weeks after the average date of the last frost and make three or four more plantings at two-week intervals. For the same reason, some supersweet varieties have to be grown at a distance from other varieties. Either plant in rows 3 feet apart and thin seedlings to stand one foot apart or plant in clumps 3 feet apart each way. Place six or seven seeds in each hill and thin to three strongest plants.