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Planting calendar for ZIP 95674 (Rio Oso, CA)

When to plant vegetables in Rio Oso, CA (USDA hardiness zone 9b). Typical last spring frost around Feb 11, 2026 25 days year to year), first fall frost around Nov 30, 202615 days).

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

See the full Rio Oso, CA planting calendar for dates typical of the whole city.

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Month by month in Rio Oso, CA

January

February

March

September

November

December

Understand your frost dates

Frost dates for ZIP 95674: NOAA 1991-2020 normals (USW00093205 MARYSVILLE YUBA CO AP, CA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.