When to plant chervil in Washington
Washington spans USDA zones 6b–9a, so the right time to plant chervil shifts by weeks across the state. The window to sow seed directly outdoors runs from about February 1 in Port Townsend to May 2 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 | February 8 – March 8 |
| Spokane | 7a | April 26 | October 15 | March 29 – April 26 |
| Tacoma | 8b | March 8 | November 14 | February 8 – March 8 |
| Vancouver | 8b | March 29 | November 9 | March 1 – March 29 |
| Bellevue | 9a | March 8 | November 23 | February 8 – March 8 |
| Kent | 8b | March 20 | November 10 | February 20 – March 20 |
| Everett | 8b | March 24 | November 2 | February 24 – March 24 |
| Spokane Valley | 7a | April 26 | October 15 | March 29 – April 26 |
Chervil in Washington: FAQ
When can I plant chervil in Washington?
Across Washington, the time to direct-sow chervil spans roughly February 1 in Port Townsend to May 2 in Cheney, each following that city's local frost dates.
Does the chervil planting date vary across Washington?
Yes. Washington publishes 132 cities with their own frost dates, so the right chervil 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 chervil take to grow in Washington?
Chervil takes about 55–70 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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