(Brassica juncea) Sow thinly in shallow drills any time from early Spring through early Fall. The rows may be from 12 to 18 inches apart and when large enough, thin out seedlings to 6-12 inches apart. The soil must be regularly hoed as this will serve to conserve the moisture in the ground by creating a dust mulch, and naturally kill all weeds. Make successive sowings every second or third week for a continuous harvest. The young flower stalks are also edible.