Start Your Onions Early
Plant In Good Soil
Feed Your Onions Regularly
Harvest Your Onions
It's hard to imagine eating without onions. From fast-food burgers to the Thanksgiving dressing and green-bean casserole, onions add flavor and interest to otherwise dull ingredients. You can eat the tops as scallions, immature bulbs as green onions, or mature bulbs as regular onions. It's easy to grow your own from seeds, sets, or transplants.
Sow onion seeds indoors 6-8 weeks before your last frost date in spring. For a summer harvest, plant sets (small bulbs) or transplants in the garden 3 weeks before the last frost date. In mild-winter regions, you can plant transplants in early winter for an early summer harvest.
To grow best, onions need loose, well-drained soil free of rocks and debris. Raised beds are ideal. Amend the soil with compost or other organic matter, such as Miracle-Gro® Organic Choice® Garden Soil"> before planting.
Apply a plant food that's high in phosphorus, such as Miracle-Gro® Liquid Quick Start® Plant Food, at the time of planting. Follow up with a complete plant food, such as Miracle-Gro® Water Soluble All Purpose Plant Food, every 2 weeks during the growing season. Water regularly, but don't flood the planting bed.
About 8 weeks after planting, scallion tops should be 6-8 inches tall and ready for picking. You can harvest green onions any time after the bulb has formed. Mature onions should be ready for harvest in mid- to late summer, when the green tops start to turn brown and fall over. Then simply pull the onions from the ground.
You can choose from two types of regular onions. Sweet onions are flavorful, mild tasting, and good raw in salads or cooked. However, they don't last long in storage. Storage onions will last as long as 4 months, but have a more pungent taste and are best cooked.