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Planting calendar for ZIP 73720 (Bison, OK)

When to plant vegetables in Bison, OK (USDA hardiness zone 7a). Typical last spring frost around Apr 14, 2026 11 days year to year), first fall frost around Oct 30, 202610 days).

Playing it safe? Spring frost holds off until about Apr 28, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Bison, OK planting calendar for dates typical of the whole city.

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Month by month in Bison, OK

January

February

March

April

May

August

September

Understand your frost dates

Frost dates for ZIP 73720: NOAA 1991-2020 normals (USC00344055 HENNESSEY 4 ESE, OK US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.