Lettuce

SCIENTIFIC NAME: Lactuca sativa

SEEDING: Sow in 3/4" plug trays, barely covering seeds with fine vermiculite, 3–4 weeks before transplanting outdoors. Shade trays on sunny, warm days if necessary to keep the soil surface cool, below 75°F (24°C), until germination. Harden seedlings by reducing water and temperature for 2-3 days before planting outdoors.

TRANSPLANTING: Transplant romaine lettuce 10-12" apart, in rows 18" apart. Other types 8-10" apart in rows 12-18" apart for full-size heads or 6" apart for mini heads.