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Planting calendar for ZIP 99003 (Chattaroy, WA)

When to plant vegetables in Chattaroy, WA (USDA hardiness zone 6b). Typical last spring frost around May 22, 2026 17 days year to year), first fall frost around Sep 14, 202613 days).

Playing it safe? Spring frost holds off until about Jun 12, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Chattaroy, WA

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 99003: NOAA 1991-2020 normals (USW00094119 DEER PARK AP, WA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.