DibbleWhen to plant tomatillo in Zone 4
In Zone 4, the last spring frost usually passes around May 10 and the first fall frost arrives around September 21, leaving about 134 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Cool climate with a brief warm window. Indoor starts and season extension help.
Planting windows for tomatillo in Zone 4
| Task | Window |
|---|---|
| Start seeds indoors | Mar 29 to Apr 12 |
| Transplant | May 17 to May 31 |
| Estimated harvest | Jul 31 to Sep 29 |
The harvest estimate counts 75 days to maturity, then a picking window of about 60 days. These windows use typical frost dates for Zone 4; Dibble pins them to your exact ZIP code.
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How to grow tomatillo
Grow tomatillos like tomatoes, but plant at least two for pollination. Fruit is ready when it fills and splits its papery husk.
Companion plants
Good neighbors for Tomatillo:
Better kept apart:
Tomatillo in nearby zones
Keep exploring
Tomatillo: the full growing guide · The Zone 4 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.