Onion
Onions and garlic · Allium cepa · Onion family · Biennial
Day-length sensitive: choose varieties for your latitude.
How it grows
| Sun | Full sun |
|---|---|
| Moisture | Dry / hilltop |
| Soil | light (sandy, sandy loam) |
| Spacing | 10 cm |
| Rotation group | Legumes, roots & onions |
| How to plant | sets, tubers, cloves or plants |
| Green manure before it | Winter wheat |
| Protector plant | Chamomile |
| Bad neighbours | Asparagus, Beans, Peas |
When to sow, by climate zone
| Zone | In the ground | Sow indoors | Sow again for autumn |
|---|---|---|---|
| Zone 2 | early May – mid-May | ||
| Zone 3 | late Apr – early May | ||
| Zone 4 | mid-Apr – late Apr | ||
| Zone 5 | early Apr – mid-Apr | ||
| Zone 6 | late Mar – late Apr | ||
| Zone 7 | mid-Mar – mid-Apr | ||
| Zone 8 | late Feb – late Mar | ||
| Zone 9 | late Jan – early Mar | ||
| Zone 10 | early Jan – mid-Feb |
Dates for the average frost dates of each zone; the app works them out for your own town.