Lettuce Butterhead (for greenhouse), John

Lettuce Butterhead (for greenhouse), John

Growing Butterhead Lettuce, specifically the variety “John,” in a greenhouse allows for controlled conditions and extended growing seasons. Here’s a guide to help you cultivate Butterhead Lettuce successfully:

1. Planting Time: Lettuce can be grown in a greenhouse throughout the year. Start seeds indoors or sow directly in the greenhouse. If starting seeds indoors, plan for transplanting when the seedlings are sturdy and have a couple of true leaves.

2. Greenhouse Conditions: Ensure the greenhouse provides a stable environment with plenty of sunlight. Butterhead Lettuce prefers cooler temperatures, ideally between 60-70°F (15-21°C). Adequate ventilation is essential to prevent overheating.

3. Soil Preparation: Use a well-draining, nutrient-rich potting mix. Amend the soil with compost to enhance fertility. Butterhead Lettuce thrives in slightly acidic to neutral soil with a pH between 6.0 and 7.0.

4. Planting Seeds or Transplants: If starting from seeds, sow them about 1/4 inch deep in rows or containers. Space the seeds according to the recommended spacing on the seed packet. If transplanting, space the seedlings according to the mature plant size.

5. Watering: Keep the soil consistently moist. Greenhouse conditions can dry out the soil quickly, so regular watering is crucial. Use a soaker hose or drip irrigation to keep the foliage dry and prevent diseases.

6. Fertilization: Use a balanced liquid fertilizer or a slow-release granular fertilizer at planting time. Follow the package instructions for application rates. Side-dress with additional fertilizer as needed during the growing season.

7. Mulching: Apply a layer of organic mulch to help retain soil moisture and regulate temperature. Mulching also suppresses weeds.

8. Harvesting: Harvest Butterhead Lettuce “John” by cutting the entire head at ground level when it reaches the desired size. Alternatively, you can harvest individual leaves as needed for a continuous harvest.

9. Successive Planting: For a constant supply, consider successive plantings every few weeks. This helps ensure a continuous harvest throughout the growing season.

10. Pest and Disease Control: Keep an eye out for aphids, caterpillars, or other greenhouse pests. Use insecticidal soap or neem oil for organic pest control. Ensure good greenhouse hygiene to minimize disease issues.

11. Temperature Management: Monitor and control the temperature in the greenhouse, especially during warmer periods. Adequate ventilation, shading, or cooling systems may be necessary to prevent heat stress.

12. Storage: Use harvested Butterhead Lettuce promptly for the best flavor and texture. If you have excess, store it in the refrigerator. However, fresh-picked lettuce is always preferable.

Growing Butterhead Lettuce “John” in a greenhouse allows you to enjoy fresh, homegrown lettuce even during less favorable outdoor conditions. Enjoy cultivating this variety for your salads and culinary delights!