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Growing onions from sets in early spring is an excellent way to enjoy a quick and rewarding harvest. Onion sets are small, immature bulbs that can be planted early in the season, allowing you to enjoy fresh onions sooner than planting seeds.
Choosing the Right Onion Sets
Select healthy, disease-free onion sets for the best results. Choose varieties suitable for your climate and intended use, such as sweet onions or storage onions. Larger sets generally produce larger bulbs, but smaller sets tend to establish more quickly.
Preparing the Soil
Onions thrive in well-drained, fertile soil with a pH between 6.0 and 7.0. Before planting, loosen the soil to a depth of about 6 inches and mix in organic matter like compost or aged manure. This improves soil fertility and drainage, promoting healthy growth.
Planting Onion Sets
Plant onion sets in early spring as soon as the soil can be worked, usually 4–6 weeks before the last expected frost. Space the sets about 4 inches apart in rows that are 12 inches apart. Bury the sets with the pointed end facing up, leaving the tops just above the soil surface.
Caring for Your Onion Plants
Water the onion beds consistently to keep the soil evenly moist, especially during dry spells. Mulching helps retain soil moisture and suppress weeds. Fertilize with a balanced fertilizer every few weeks to support healthy bulb development.
Harvesting and Storage
Onions are ready to harvest when the tops begin to yellow and fall over, typically 100–120 days after planting. Carefully lift the bulbs with a garden fork and allow them to cure in a warm, dry, well-ventilated area for a few weeks. Once cured, store onions in a cool, dark place for long-term use.
Tips for a Faster Harvest
- Plant early in the spring as soon as the ground is workable.
- Choose large, healthy sets for quicker growth.
- Maintain consistent moisture and avoid letting the soil dry out.
- Apply fertilizer regularly to promote vigorous growth.
- Keep weeds under control to reduce competition for nutrients.
By following these steps, you can enjoy fresh onions in a shorter time and make the most of your early spring planting season. Happy gardening!