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Planting calendar for ZIP 99688 (Willow, AK)

When to plant vegetables in Willow, AK (USDA hardiness zone 3b). Typical last spring frost around May 15, 2026 10 days year to year), first fall frost around Sep 18, 20269 days).

Playing it safe? Spring frost holds off until about May 27, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Willow, AK planting calendar for dates typical of the whole city.

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Month by month in Willow, AK

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 99688: NOAA 1991-2020 normals (USC00509861 WILLOW WEST, AK US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.