When to plant shiso (perilla) in Washington
Washington spans USDA zones 6b–9a, so the right time to plant shiso (perilla) shifts by weeks across the state. The window to transplant seedlings 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 | Transplant out |
|---|---|---|---|---|
| Seattle | 9a | March 8 | November 23 | March 15 – March 22 |
| Spokane | 7a | April 26 | October 15 | May 3 – May 10 |
| Tacoma | 8b | March 8 | November 14 | March 15 – March 22 |
| Vancouver | 8b | March 29 | November 9 | April 5 – April 12 |
| Bellevue | 9a | March 8 | November 23 | March 15 – March 22 |
| Kent | 8b | March 20 | November 10 | March 27 – April 3 |
| Everett | 8b | March 24 | November 2 | March 31 – April 7 |
| Spokane Valley | 7a | April 26 | October 15 | May 3 – May 10 |
Shiso (Perilla) in Washington: FAQ
When can I plant shiso (perilla) in Washington?
Across Washington, the time to transplant shiso (perilla) spans roughly March 8 in Port Townsend to June 6 in Cheney, each following that city's local frost dates.
Does the shiso (perilla) planting date vary across Washington?
Yes. Washington publishes 132 cities with their own frost dates, so the right shiso (perilla) 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 shiso (perilla) take to grow in Washington?
Shiso (Perilla) takes about 70–90 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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