Frost dates across Maine
Typical last spring frost, first fall frost, and USDA zone for 4 Maine cities, from 30-year NOAA climate normals. Every date is a 50 percent odds line, not a promise. Pick a city for the full frost window and what is plantable there now.
| City | Last spring frost | First fall frost | Season length | Zone |
|---|---|---|---|---|
| Portland | Apr 26 | Oct 15 | about 172 days | 6a |
| Lewiston | May 1 | Oct 10 | about 162 days | 5b |
| Bangor | May 4 | Oct 4 | about 153 days | 5a |
| South Portland | Apr 26 | Oct 15 | about 172 days | 6a |
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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