Photos are representative and may not match your specific variety.

Romaine Cos

Lettuce

Lactuca sativa var. longifolia 'Cos'

Overview
The classic upright lettuce that forms tall, sturdy heads of dark green leaves with prominent white ribs and exceptional crunch. This traditional variety has been cultivated for over 2,000 years and remains the gold standard for Caesar salads and Mediterranean cuisine. Its robust structure and intense flavor make it indispensable for gardeners who want restaurant-quality lettuce at home.
Planting
Direct sow 1/4 inch deep in early spring or start indoors. Thin seedlings to proper spacing when 2 inches tall.
Growing
Sun: partial. Soil pH: 6–7. Space plants 8" apart. Germination: 7-10.
Pests & diseases
Common pests: Aphids, leafminers, cutworms, flea beetles. Common diseases: Downy mildew, bottom rot, tipburn, bacterial leaf spot.