DibbleWhen to plant tomatillos in Zone 3
In Zone 3, the last spring frost usually passes around May 15 and the first fall frost arrives around September 15, leaving about 123 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Short, cool season. Start most warm crops indoors and protect from late frosts.
Planting windows for tomatillos in Zone 3
| Task | Window |
|---|---|
| Start seeds indoors | Apr 3 to Apr 17 |
| Transplant | May 22 to Jun 5 |
| Estimated harvest | Aug 5 to Oct 4 |
The harvest estimate counts 75 days to maturity, then a picking window of about 60 days. These windows use typical frost dates for Zone 3; Dibble pins them to your exact ZIP code.
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Tomatillo in a Zone 3 season
Zone 3 gives about 123 frost-free days. Tomatillo needs roughly 75 days from transplant. That leaves about 48 days of slack, enough for one full crop with a little room for a cold spring.
How to grow tomatillos
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 other zones
Not in Zone 3? Pick your zone for the same dated windows.
Keep exploring
Tomatillo: the full growing guide · The Zone 3 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.