Spring onions are primarily grown from seed and thrive in fertile, well-drained soil under full sun.
Here's a detailed guide to growing spring onions:
Soil Preparation
- Spring onions prefer fertile, well-drained soil. Amend the soil with compost or well-rotted manure before planting. This improves drainage and provides essential nutrients.
- Ensure the soil pH is between 6.0 and 7.0.
Sowing Seeds
- Timing: For a continuous summer harvest, sow seeds every three weeks from March to August. For overwintering, sow in September for a spring harvest.
- Method: Sow seeds directly into the ground about 1/2 inch deep and 1 inch apart. Alternatively, start seeds indoors 6-8 weeks before the last expected frost.
- Spacing: When transplanting seedlings, space them about 2 inches apart in rows that are 6 inches apart.
Growing Conditions
- Sunlight: Spring onions require full sun, meaning at least 6 hours of direct sunlight per day.
- Watering: Keep the soil consistently moist, especially during dry periods.
- Weeding: Regularly remove weeds to prevent competition for nutrients and water.
Harvesting
- Spring onions are ready to harvest when they reach the desired size, typically 6-8 inches tall.
- You can harvest them by gently pulling them from the soil.
- Harvesting can begin approximately 8 weeks after sowing.
Continuous Harvest
- To enjoy a continuous supply of spring onions, sow seeds in succession every few weeks. This ensures a steady harvest throughout the growing season.
Overwintering
- Sowing in September allows for a spring harvest. Choose a hardy variety suitable for overwintering in your region.
- Provide protection during harsh winters with a cold frame or cloche.
