Onions make good companions for several garden vegetables. However, DO NOT plant onions near peas or beans.
Dietary Fiber, Chromium, Manganese, Vitamin C, B6, Folate, Potassium
Climate & Growing Conditions
Growing onions is a garden favorite in nearly any climate. However, onions are temperature sensitive and do not like beds that get too hot. When growing onions, select varieties that match your growing season and storage needs. Plant in a sunny location. Warm weather is best for bulb growth, as cool weather promotes top growth.
Prepare the Garden Soil
The soil pH needed for growing onions is 6.0-7.0. Prepare the garden bed in advance with large quantities of compost and/or well-rotted manure. The soil needs to be loose and deeply dug.
There are three variety categories for growing onions: Early, Mid-Season, or Late-Maturing. Plant early types in mid-to-late summer. Plant mid-season varieties in autumn. Plant late maturing varieties in late autumn/early winter.
Sow seeds directly in the ground or transplant bulbs.
Gardening tip for growing onions - You'll get the fastest results when growing onions for use as green onions/scallions, if you plant onion sets, rather than seeds. (Note: scallions are a different onion type, but young onions substitute.)
Water regularly and evenly to create the best environment for growing onions. Not watering enough will slow cause the plants to grow slowly and the bulbs to split.
Fertilize mid-season. Use well-rotted manure, compost tea, bone meal, or a complete fertilizer.
Fertilizer applied as the plant nears maturity can causes excess leaf growth (and small bulbs).
Onion maggots can be a problem. However, they thrive in new organic material. Prevent onion maggots by using only organic garden material (compost, manures) that's well-rotted.
Other problems: Downy Mildew, Onion Thrip (white spots on leaves).
Gardening tip for growing onions - Practice good vegetable gardening by rotating crops throughout the garden each season. This prevents many plant diseases.
When the onion leaves start to yellow, bend them to one side. Once the leaves have died, pull plant from the ground and leave in the sun to dry (in dry weather) for a few days.
Store in your cold cellar in breathable or mesh bags (if possible). Examine periodically for (and remove) rotted onions.