When to plant edamame in Washington
Washington spans USDA zones 6b–9a, so the right time to plant edamame shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 8 in Port Townsend to June 6 in Cheney — below are local dates for 132 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Seattle | 9a | March 8 | November 23 | March 15 – April 5 |
| Spokane | 7a | April 26 | October 15 | May 3 – May 24 |
| Tacoma | 8b | March 8 | November 14 | March 15 – April 5 |
| Vancouver | 8b | March 29 | November 9 | April 5 – April 26 |
| Bellevue | 9a | March 8 | November 23 | March 15 – April 5 |
| Kent | 8b | March 20 | November 10 | March 27 – April 17 |
| Everett | 8b | March 24 | November 2 | March 31 – April 21 |
| Spokane Valley | 7a | April 26 | October 15 | May 3 – May 24 |
Edamame in Washington: FAQ
When can I plant edamame in Washington?
Across Washington, the time to direct-sow edamame spans roughly March 8 in Port Townsend to June 6 in Cheney, each following that city's local frost dates.
Does the edamame planting date vary across Washington?
Yes. Washington publishes 132 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 Washington?
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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