Botanical Name: Lactuca sativa
Days to Maturity: 21–48 days
Native: Unknown; lettuce has been in cultivation for a long time.
Hardiness: Frost-tolerant annual
Plant Dimensions: 6″–8″ wide, 6″–8″ tall
Variety Information: Glossy, upright, cherry-red leaves with a green midrib. ‘Truchas’ is a miniature, romaine-type lettuce with resistance to downy mildew, lettuce die-back, and lettuce mosaic virus.
When to Sow Outside: 2 to 4 weeks before your average last frost date, and when soil temperature is at least 40°F, ideally 60°–70°F. Successive Sowings: Every 3 weeks until 4 to 6 weeks before your average first fall frost date. Mild Climates: Sow in fall and winter for cool season harvests.
When to Start Inside: RECOMMENDED. 4 to 6 weeks before your average last frost date, and in summer when soil temperatures are too warm (above 80°F) to germinate lettuce seed.
Days to Emerge: 5–10 days
Seed Depth: 1/8″–1/4″
Seed Spacing: 1 seed every 8″
Row Spacing: 10″
Thinning: Not required
Harvesting: Harvest in the morning, by cutting off at ground level. If regrowth is desired, cut the leaves higher, at 2″. For a continual supply, outer, individual leaves can be harvested at any stage of maturity, but leave at least half of the plant for regrowth.