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Planting calendar for ZIP 61728 (Colfax, IL)

When to plant vegetables in Colfax, IL (USDA hardiness zone 6a). Typical last spring frost around Apr 23, 2026 11 days year to year), first fall frost around Oct 15, 202612 days).

Playing it safe? Spring frost holds off until about May 7, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Colfax, IL planting calendar for dates typical of the whole city.

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Month by month in Colfax, IL

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 61728: NOAA 1991-2020 normals (USC00111475 CHENOA, IL US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.