1000+Romaine Lettuce Seeds Parris Island Cos Romaine Lettuce(Lactuca sativa) Parris Island Cos is crisp, flavorful, and has the highest nutritional value of any lettuce! Upright plants form 8-12 inch neatly folded heads of lettuce with dark green leaves and a creamy white heart. Good uniformity with tolerance to Tipburn, mosaic and bolting. Named after Parris Island off South Carolina. Parris Island lettuce was first introduced in 1952. Today, it is celebrated as a reliable heirloom lettuce and is a favorite romaine lettuce (also called cos) in the southeastern U.S. where it can be grown in fall, winter and spring. Sow and Grow Seeds can be sown directly in the garden and will mature in about 65-70 days. They should be planted in rows set about 36 inches (91 cm.) apart and thinned so that plants are no closer than 12 inches (30 cm.) apart. Lettuce plants require about an inch (2.5 cm.) of water per week for optimal growth. If growing Parris Island cos lettuce during the hot summer months, they will require extra water to prevent bolting. Keeping the soil cool and moist with layers of mulch or straw will also help it grow through difficult weather.