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Planting calendar for ZIP 50009 (Altoona, IA)

When to plant vegetables in Altoona, IA (USDA hardiness zone 5b). Typical last spring frost around Apr 21, 2026 11 days year to year), first fall frost around Oct 15, 202611 days).

Playing it safe? Spring frost holds off until about May 5, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Altoona, IA planting calendar for dates typical of the whole city.

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Month by month in Altoona, IA

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 50009: NOAA 1991-2020 normals (USW00054902 DES MOINES 17 E, IA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.