Choose a sunny location with well-drained soil
Loosen the soil to a depth of 8 to 12 inches
Mix in compost or well-rotted organic matter
Test soil pH and aim for 6.0 to 7.0
Plant red onion sets, seedlings, or transplants in early spring
Space bulbs or seedlings 4 to 6 inches apart
Space rows 12 to 18 inches apart
Plant each set or seedling 1 inch deep
Keep the pointed end facing up
Water immediately after planting
Keep soil consistently moist but not waterlogged
Remove weeds regularly
Apply a light mulch to retain moisture and suppress weeds
Feed with a balanced fertilizer as needed
Harvest when tops begin to yellow and fall over
Cure harvested onions in a dry, airy place before storing