Leek
Onions and garlic · Allium porrum · Onion family · Biennial
Long season; can stay in the ground into winter.
How it grows
| Sun | Part shade |
|---|---|
| Moisture | Wet / low spot |
| Soil | heavy (clay loam) |
| Spacing | 15 cm |
| Rotation group | Legumes, roots & onions |
| How to plant | seedlings |
| Green manure before it | Barley |
| Protector plant | Celery |
| Bad neighbours | Beans, Peas |
When to sow, by climate zone
| Zone | In the ground | Sow indoors | Sow again for autumn |
|---|---|---|---|
| Zone 3 | late Apr – early May | late Feb | |
| Zone 4 | mid-Apr – late Apr | mid-Feb | |
| Zone 5 | early Apr – mid-Apr | early Feb | |
| Zone 6 | late Mar – late Apr | late Jan | |
| Zone 7 | mid-Mar – mid-Apr | mid-Jan | |
| Zone 8 | late Feb – late Mar | late Dec | |
| Zone 9 | late Jan – early Mar | late Nov |
Dates for the average frost dates of each zone; the app works them out for your own town.