Romaine Cos Lettuce Seedling, 8 pcs

Plant cos lettuce seedlings about 20-25cm (8-10 inches) apart from each other. This spacing allows enough room for the lettuce heads to develop fully.

The time to harvest cos lettuce from seedlings typically ranges from 8 to 10 weeks, depending on the variety and growing conditions. Harvest the entire head of lettuce when it reaches its mature size and is firm and compact.

Cos lettuce seedlings prefer full sunlight, but they can also tolerate partial shade. Provide them with at least 4-6 hours of direct sunlight daily. If you're growing them indoors, use a bright, indirect light source or provide them with 10-12 hours of light under a growth light.

Choose well-draining soil for your cos lettuce seedlings. The soil should be fertile and rich in organic matter. A pH level between 6.0 and 7.0 is ideal for the best growth and nutrient uptake by the plants.

Keep the soil consistently moist. Cos lettuce seedlings prefer regular watering, especially during hot and dry periods. Ensure the soil remains evenly moist but not waterlogged. Water at the base of the plants to avoid wetting the foliage, which can lead to fungal issues.

Cos lettuce benefits from a nutrient-rich soil. Before planting, incorporate a balanced fertilizer into the soil following the recommended application rates. As the seedlings grow, you can side-dress them with compost or apply a balanced, water-soluble fertilizer every 3-4 weeks to provide ongoing nourishment.

Regularly monitor the pH and electrical conductivity (EC) levels of the nutrient solution. Lettuce thrives in slightly acidic conditions, with a pH range between 5.5 and 6.5. The EC level should be gradually adjusted from 1.2 to 1.8 mS/cm to match the specific growth stage of the lettuce seedlings.

Keep an eye out for common lettuce pests like aphids, slugs, and snails. Inspect your cos lettuce seedlings regularly and take appropriate measures to protect them from pests.

Cos lettuce prefers cooler temperatures and can bolt (go to seed prematurely) in hot weather. Consider using shade cloth or planting them in a location that receives some protection from intense afternoon sun.