Onions are a cold-season crop that belong to the Allium family. Many onion cultivars, from sweet onions to red onions and yellow onions, are hardy enough to be planted and grown in moderate temperatures. Onion plants are easy to grow and provide a variety of benefits through companion planting, providing all-natural, organic defenses for your flora and vegetable garden against pests and other negative consequences.
Onions should be planted when the temperature is cool. If you live in a cold climate, start planting onions as soon as the ground is workable (dirt can be smoothed), which could be in late Spring.
Onions can be planted as late as the fall in milder locations, withstand a winter growing season, and be ready for harvest in early spring.
Planting onion seeds takes longer, so start the process by germinating your seeds indoors. Fill a planting tray or other suitable container halfway with damp soil and dig seedling furrows half an inch deep.
Keep the temperature warm, around 60 to 70 degrees Fahrenheit, by lightly covering with soil.
Your onion seedlings are ready to be transplanted into your garden once they germinate (which might take anywhere from a few days to a few weeks). For your onion transplants, dig holes about two inches deep and four to five inches apart in rows that are 12 to 18 inches apart.
Cabbage, tomatoes, leeks, and carrots are all excellent onion companions. Plants that attract beneficial insects and other organic defenses should be kept close.
Mulch or other organic materials can be used between onion rows to help smother weeds and keep moisture in the soil. Onion seeds or onion sets can be planted. Onion sets are miniature onion bulbs that, after a few months, can be planted and grown into full-sized bulbs.
When planting onion sets in your vegetable garden, bury them one inch under the dirt and space them two to six inches apart. The soil around the onions should not be compacted; instead, it should be loosely covered.
Look for brown onion tops crowning their heads through the dirt while harvesting onions; they can be pulled straight from the ground.
Onions should be stored in a cold, dark, and dry location. Onions that have sprouted flower stalks are mature and should be plucked and used as soon as possible.