Some types and varieties of lettuce withstand heat better than others. Leaf lettuce is best adapted to Arkansas conditions and produces crisp leaves loosely arranged on the stalk. Nearly every gardener has at least a short row of lettuce, making it the most widely planted salad vegetable. Cos or Romaine forms an upright, elongated head and is an excellent addition to salads and sandwiches. The butterhead varieties are generally small, semiheading types that have tender, soft leaves and a delicate flavor.
Stem lettuce forms an elongated seedstalk that is used mainly in stewed, creamed and Chinese dishes.
Crisphead varieties are the least adapted to Arkansas conditions and require the most care. They are extremely sensitive to heat and rain and must be grown from transplants that are started early. Back To Top Sources There are many different sources for these cultivars. Cos and butterhead lettuce can be planted in the spring when the soil is dry enough to rake the surface. May. Late planting started in mid-August will mature during cool fall weather.