Spinach

Can be planted close together for baby spinach or 6-12 inches for larger heads.  Likes the cooler weather.  Harvest when you are hungry.

Very hardy. Must be planted as soon as the ground can be worked in the spring to avoid early bolting. Heat, crowding and long day-length (over 14 hours) trigger premature bolting. To retard bolting, avoid hot-weather planting, use wider spacing and irrigate or use shade cloth.