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Planting calendar for ZIP 53046 (Lannon, WI)

When to plant vegetables in Lannon, WI (USDA hardiness zone 5b). Typical last spring frost around Apr 30, 2026 12 days year to year), first fall frost around Oct 16, 202611 days).

Playing it safe? Spring frost holds off until about May 15, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Lannon, WI planting calendar for dates typical of the whole city.

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Month by month in Lannon, WI

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 53046: NOAA 1991-2020 normals (USC00477148 RICHFIELD 3 SSW, WI US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.