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When to plant rosemary in Washington

Washington spans USDA zones 6b–9a, so the right time to plant rosemary 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.

In Seattlethe rosemary transplant out window (March 15–March 22) has passed for this year.
CityZoneLast frostFirst frostTransplant out
Seattle9aMarch 8November 23March 15 – March 22
Spokane7aApril 26October 15May 3 – May 10
Tacoma8bMarch 8November 14March 15 – March 22
Vancouver8bMarch 29November 9April 5 – April 12
Bellevue9aMarch 8November 23March 15 – March 22
Kent8bMarch 20November 10March 27 – April 3
Everett8bMarch 24November 2March 31 – April 7
Spokane Valley7aApril 26October 15May 3 – May 10

Rosemary in Washington: FAQ

When can I plant rosemary in Washington?

Across Washington, the time to transplant rosemary spans roughly March 8 in Port Townsend to June 6 in Cheney, each following that city's local frost dates.

Does the rosemary planting date vary across Washington?

Yes. Washington publishes 132 cities with their own frost dates, so the right rosemary planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.

Planting reminders

Never miss a window in your area

An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.

Rosemary planting guide →All Washington cities →Washington planting calendar →
When to Plant Rosemary in Washington — Frost-Based Dates by City — BlissGarden