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Zone 4b planting calendar

When to start vegetables in USDA hardiness zone 4b. Typical last spring frost around May 8, 2026 11 days year to year), first fall frost around Oct 3, 202610 days). Based on 1,333 ZIP codes in the zone — exact dates vary by location.

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

Want exact dates for your address, a drag-and-drop bed layout, and reminders when it’s time to sow? Enter your ZIP:

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Still time to plant

As of today, these crops can still reach harvest before zone 4b’s first frost (~Oct 3, 2026) — fastest first.

Month by month in zone 4b

January

February

March

April

May

June

July

August

Frost dates are NOAA 1991–2020 climate normals for a representative location (Utica, MN) in zone 4b; your exact dates depend on your address. Schedules are guidance, not guarantees.