How to grow onion
Allium cepa
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Open the planting calendarGrowing conditions
- Days to maturity
- 100 to 120 (from sowing)
- Spacing
- 3 to 4 in apart, rows 8 in
- Planting depth
- 0.25 in
- Sun
- Full sun
- Water
- 1 in per week
- Soil pH
- 6 to 7
Common problems
- onion maggot
- thrips
- neck rot
- basal rot
- pink root
- bolting
Sources
- Utah State University Extension: How to Grow Onions in Your Garden
- University of Minnesota Extension: Growing onions in home gardens
Last updated 2026-06-11.