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Planting calendar for ZIP 66067 (Ottawa, KS)

When to plant vegetables in Ottawa, KS (USDA hardiness zone 6b). Typical last spring frost around Apr 18, 2026 10 days year to year), first fall frost around Oct 20, 202611 days).

Playing it safe? Spring frost holds off until about Apr 30, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Ottawa, KS planting calendar for dates typical of the whole city.

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Month by month in Ottawa, KS

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 66067: NOAA 1991-2020 normals (USC00146128 OTTAWA, KS US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.