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Planting calendar for ZIP 98651 (Underwood, WA)

When to plant vegetables in Underwood, WA (USDA hardiness zone 8a). Typical last spring frost around Apr 20, 2026 16 days year to year), first fall frost around Oct 13, 202613 days).

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

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

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Month by month in Underwood, WA

January

February

March

April

May

July

August

Understand your frost dates

Frost dates for ZIP 98651: NOAA 1991-2020 normals (USC00354003 HOOD RVR EXP STN, OR US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.