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Planting calendar for ZIP 98856 (Twisp, WA)

When to plant vegetables in Twisp, WA (USDA hardiness zone 6b). Typical last spring frost around May 15, 2026 13 days year to year), first fall frost around Sep 22, 20269 days).

Playing it safe? Spring frost holds off until about May 31, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Twisp, WA planting calendar for dates typical of the whole city.

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Month by month in Twisp, WA

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 98856: NOAA 1991-2020 normals (USC00459376 WINTHROP 1 WSW, WA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.