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Planting calendar for ZIP 63039 (Gray Summit, MO)

When to plant vegetables in Gray Summit, MO (USDA hardiness zone 6b). Typical last spring frost around Apr 8, 2026 11 days year to year), first fall frost around Oct 25, 20269 days).

Playing it safe? Spring frost holds off until about Apr 22, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Gray Summit, MO planting calendar for dates typical of the whole city.

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Month by month in Gray Summit, MO

January

February

March

April

May

August

September

December

Understand your frost dates

Frost dates for ZIP 63039: NOAA 1991-2020 normals (USC00238746 WASHINGTON, MO US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.