DibbleWhen to plant oregano 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 oregano in Zone 3
| Task | Window |
|---|---|
| Start seeds indoors | Apr 3 to Apr 17 |
| Transplant | May 15 to May 29 |
| Estimated harvest | Aug 13 to Jan 10 |
The harvest estimate counts 90 days to maturity, then a picking window of about 150 days. These windows use typical frost dates for Zone 3; Dibble pins them to your exact ZIP code.
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How to grow oregano
Start indoors 6 weeks before last frost or set out transplants. A spreading, hardy perennial, flavor deepens in full sun.
Companion plants
Good neighbors for Oregano:
Oregano in nearby zones
Keep exploring
Oregano: 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.