This is a leafy annual, which is grown for its succulent crisp leaves; it will produce globular heads which are pale green. The lettuce will mature very quickly and can be harvested by the leaf or by the head, The loose-leaf varieties are harvested by the outer leaves so that the plant can grow new leaves to be harvested later. The crisphead varieties are very popular for their loosely formed heads of crisp, curling leaves. The butterhead types produce tender leaves that are very tasty. Grow in moist, fertile soil that will not dry out and give full sun or dappled shade.