DibbleWhen to plant leek in Zone 5
In Zone 5, the last spring frost usually passes around April 30 and the first fall frost arrives around October 1, leaving about 154 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Classic temperate season. Most vegetables and flowers do well with normal timing.
Planting windows for leek in Zone 5
| Task | Window |
|---|---|
| Start seeds indoors | Feb 19 to Mar 5 |
| Transplant | Apr 16 to Apr 30 |
| Estimated harvest | Aug 14 to Sep 28 |
The harvest estimate counts 120 days to maturity, then a picking window of about 45 days. These windows use typical frost dates for Zone 5; Dibble pins them to your exact ZIP code.
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How to grow leek
Start indoors 10 weeks before last frost. Transplant into a deep hole and hill soil up the stem to blanch the white shanks.
Companion plants
Good neighbors for Leek:
Better kept apart:
Leek in nearby zones
Keep exploring
Leek: the full growing guide · The Zone 5 planting calendar · Every crop and zone
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Dates are estimates based on typical frost dates for the zone. Your yard has its own microclimate, so use them as a starting point and adjust as you learn your space.