When to plant mizuna in Washington
Washington spans USDA zones 6b–9a, so the right time to plant mizuna 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 22 |
| Spokane | 7a | April 26 | October 15 | March 29 – May 10 |
| Tacoma | 8b | March 8 | November 14 | February 8 – March 22 |
| Vancouver | 8b | March 29 | November 9 | March 1 – April 12 |
| Bellevue | 9a | March 8 | November 23 | February 8 – March 22 |
| Kent | 8b | March 20 | November 10 | February 20 – April 3 |
| Everett | 8b | March 24 | November 2 | February 24 – April 7 |
| Spokane Valley | 7a | April 26 | October 15 | March 29 – May 10 |
Mizuna in Washington: FAQ
When can I plant mizuna in Washington?
Across Washington, the time to direct-sow mizuna spans roughly February 1 in Port Townsend to May 2 in Cheney, each following that city's local frost dates.
Does the mizuna planting date vary across Washington?
Yes. Washington publishes 132 cities with their own frost dates, so the right mizuna 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 mizuna take to grow in Washington?
Mizuna takes about 40–50 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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