Lettuce belongs to family of Asteraceae. It is also called as Salad crops as it is consumed in uncooked form. Because of its diet and medicinal values, its demand is increasing rapidly. It is mostly grown for leaves purpose but sometime it is cultivated for seed and stem purpose. It is good source of Vitamin K and chlorophyll. Among different types of lettuce, loose leaf is considered as best as it contain high amount of iron and vitamin A and C. China is a top producer of Lettuce in world.