When to plant edamame in Maine
Maine spans USDA zones 5a–6a, so the right time to plant edamame shifts by weeks across the state. The window to sow seed directly outdoors runs from about May 2 in Lewiston to May 23 in Sanford — below are local dates for 13 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Portland | 6a | April 26 | October 15 | May 3 – May 24 |
| Lewiston | 5b | April 25 | October 19 | May 2 – May 23 |
| Bangor | 5a | May 4 | October 4 | May 11 – June 1 |
| South Portland | 6a | April 26 | October 15 | May 3 – May 24 |
| Auburn | 5b | April 25 | October 19 | May 2 – May 23 |
| Biddeford | 6a | May 9 | October 3 | May 16 – June 6 |
| Sanford | 5b | May 16 | September 30 | May 23 – June 13 |
| Saco | 6a | April 26 | October 15 | May 3 – May 24 |
Edamame in Maine: FAQ
When can I plant edamame in Maine?
Across Maine, the time to direct-sow edamame spans roughly May 2 in Lewiston to May 23 in Sanford, each following that city's local frost dates.
Does the edamame planting date vary across Maine?
Yes. Maine publishes 13 cities with their own frost dates, so the right edamame planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does edamame take to grow in Maine?
Edamame takes about 75–95 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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