DibbleWhen to plant peppers 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 peppers in Zone 3
| Task | Window |
|---|---|
| Start seeds indoors | Mar 20 to Apr 3 |
| Transplant | May 29 to Jun 12 |
| Estimated harvest | Aug 7 to Oct 6 |
The harvest estimate counts 70 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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Pepper in a Zone 3 season
Zone 3 gives about 123 frost-free days. Pepper needs roughly 70 days from transplant. That leaves about 53 days of slack, enough for one full crop with a little room for a cold spring.
How to grow peppers
Peppers love warmth. Start indoors 8 weeks before last frost and wait until soil is warm (2 weeks after frost) to transplant.
Companion plants
Good neighbors for Pepper:
Better kept apart:
Pepper in other zones
Not in Zone 3? Pick your zone for the same dated windows.
Keep exploring
Pepper: the full growing guide · The Zone 3 planting calendar · Every crop and zone
Plant at the right time this season
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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.