Usually grown as a fall crop. Can withstand frost, and usually tastes even better after frosts. Sow seed into a seedbed in May, planting thinly about 1/4 inch deep. Transplant in July when plants are about 6 inches high. Set 12 to 18 inches apart in rows that are 24 inches apart. Let them remain until after frost. Then harvest often, first removing the lowest sprouts. One packet of seed produces about 200 plants.