Romaine Lettuce

Romaine lettuce, also known as Lactuca sativa var. longifolia, is a popular variety of leafy green commonly used in salads and sandwiches. It features long, upright leaves with a firm central rib and a crisp texture. The leaves are typically medium to dark green and have a slightly bitter, yet refreshing flavour. Unlike softer lettuces, romaine maintains its structure well, making it ideal for hearty dishes like Caesar salad. It's low in calories and a good source of vitamins A, C, and K, as well as folate and fiber. Romaine can be eaten raw or lightly grilled for a smoky twist. Its crunchy texture and nutritional value make it a staple in both home kitchens and professional culinary settings.

How To Grow

  1. Choose the Right Location Sunlight: Romaine lettuce prefers full sun but can tolerate partial shade, especially in hot climates. Soil: Well-draining, fertile soil rich in organic matter. A pH between 6.0 and 6.8 is ideal.

  2. When to Plant Cool-season crop: Plant in early spring or late summer for a fall harvest. Temperature: Best grown in temperatures between 45°F and 75°F (7°C–24°C).

  3. Starting Seeds Direct sow: Plant seeds 1/4 inch deep directly into the garden. Spacing: Thin seedlings to 6–8 inches apart; rows should be about 12–18 inches apart. Germination: Seeds sprout in 7–14 days.

  4. Caring for Your Romaine Watering: Keep the soil consistently moist but not waterlogged. Lettuce has shallow roots and needs regular watering. Mulching: Use mulch to retain moisture and keep the soil cool. Fertilizing: Use a balanced, nitrogen-rich fertilizer if needed—especially in poor soil.

  5. Pest & Disease Control Watch for: Aphids, slugs, snails, and cutworms. Prevent diseases: Avoid overhead watering and practice crop rotation to prevent fungal issues.

How/When To Harvesting

  1. Harvesting the Whole Head When to harvest: About 60–75 days after planting, when the head is firm and about 6–8 inches tall.

How to do it: Use a sharp knife or garden shears. Cut the head at the base, just above the soil. Leave the root in the ground—some plants may regrow small heads if conditions are right.

  1. Harvesting Leaf-by-Leaf (Cut-and-Come-Again) When to harvest: Once the outer leaves are large enough to use, usually 30–40 days after planting.

How to do it: Gently snap or cut the outer leaves 1 inch above the base. Leave the inner leaves and core to keep growing. This method allows for a longer harvest period and multiple cuttings.

  • Sow Depth: 0.6 cm
  • Spacing Between Rows: 20 cm
  • Spacing Along Row: 20 cm
  • Number plants per Square Foot: 4