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Planting calendar for ZIP 63373 (Portage Des Sioux, MO)

When to plant vegetables in Portage Des Sioux, MO (USDA hardiness zone 6b). Typical last spring frost around Apr 5, 2026 12 days year to year), first fall frost around Oct 27, 202611 days).

Playing it safe? Spring frost holds off until about Apr 20, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Portage Des Sioux, MO planting calendar for dates typical of the whole city.

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Month by month in Portage Des Sioux, MO

January

February

March

April

May

August

September

December

Understand your frost dates

Frost dates for ZIP 63373: NOAA 1991-2020 normals (USW00053904 ST CHARLES CO AP, MO US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.