Throughout the United States.
Sow seeds 1/4 inch deep. Thin seedlings or set transplants 4 to 6 inches apart. For a continuous harvest, plant some seeds or plants every 2 weeks.
Garden soil that''s rich in organic material.
Apply enough water to keep the soil moist but not wet. Do not allow the soil to dry out.
In cool-summer regions, you can grow lettuce all summer and into fall. In areas where winters are mild, you can grow it into the fall and winter. Where both summers and winters are mild, you can grow lettuce year-round.
At planting time, add a continuous-release plant food formulated for vegetables.
Cut plants with a sharp knife in the early morning. Head types: Head should be full and firm. Cut just above the soil line. Looseleaf types: The entire plant may be cut when it''s the size of your hand, or pick the outer leaves as you need them. Leave a few center leaves for future picking.