When to Plant Leeks in Zone 4
In USDA zone 4a, plant outdoors November 14 to July 12, and expect your first harvest around July 12. (4a shown here — see 4a and 4b dates separately below.)
Leeks planting calendar for USDA Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Direct sow
Nov 14
Projected first harvest
Jul 12
Most leeks mature in about 130 to 240 days depending on the variety, needing roughly 128 frost-free days in zone 4a.
Leeks planting calendar for USDA Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Direct sow
Nov 9
Projected first harvest
Jul 7
Most leeks mature in about 130 to 240 days depending on the variety, needing roughly 138 frost-free days in zone 4b.
Not sure whether you're in 4a or 4b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
2 varieties of leeks in the HomeSown library. Tap any for its full grow guide.
Common problems with leeks
What to watch for, with identification and treatment for each
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