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Forreston, IL planting calendar

When to plant vegetables in Forreston, IL (USDA hardiness zone 5b). Typical last spring frost around Apr 29, 2026 11 days year to year), first fall frost around Oct 7, 202611 days).

Playing it safe? Spring frost holds off until about May 13, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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Still time to plant

As of today, these crops can still reach harvest before Forreston, IL’s first frost (~Oct 7, 2026) — fastest first.

Month by month in Forreston, IL

January

February

March

April

May

July

August

Understand your frost dates

More Illinois planting calendars

ZIP codes in Forreston

61030

Frost dates are NOAA 1991–2020 climate normals for a representative location in Forreston, IL (covering 1 ZIP); your exact dates depend on your address. Schedules are guidance, not guarantees.