Spring Tower

Celtuce is grown in a similar manner as head lettuce. Sow seed 3-4 weeks before transplanting outdoors in flats or cell-type containers 1/8" deep, about 1/4" apart. For a continuous supply, sow every 2-3 weeks. Shade flats on sunny, warm days, if necessary, to keep the soil surface below 75°F (24°C) until germination. If sowing into flats, transplant about 2 weeks later 1-2" apart in flats, pots, or 3/4-1" cell-type containers. Harden seedlings by reducing water and temperature for 2-4 days before transplanting outdoors. Celtuce plants are hardy to light frost. Transplant 8-12" apart in rows 12-18" apart. If direct seeding, begin sowing in spring as soon as the soil is prepared. The seeds will germinate even at low, 40°F (4°C) soil temperature, but poorly above 75°F (24°C). Sow seeds about 1" apart in rows 12-18" apart or sow in clusters of 3-4 seeds every 8". Cover seeds lightly, about 1/8", firm soil gently, and keep surface moist until emergence in 3-5 days (or longer in cold weather). Thin to 8" apart.