Flavorful red leaf lettuce will not only add color to your salads but a healthy amount of fiber, vitamin A, and vitamin K. The high water content (about 95%) and low-calorie count makes this and all lettuces a healthy diet choice, with the darker lettuces such as red leaf carrying more nutrients than the lighter colored ones. The red pigment in red leaf lettuce contains the antioxidants beta-carotene, which may reduce the risk of developing cataracts, and lutein, important for both eye and skin health Red leaf lettuce grows in an open "head" of loose leaves that deepens in color as it matures. The bronze-red leaves hold their color and sweetness as the weather warms in the spring. It is fast growing, heat tolerant, and slow to bolt. Very high in nutrition. Grows best in full sun, but will tolerate partial shade and even appreciates it in spring in hot climates. The red color is best in full sun and cool weather.  Light: Full sun to part shade  Head size: 8 to 12 inches (loose-leaf type)  Matures: 21 days for leaves, 45 for head  Plant spacing: 10 to 15 inches apart