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Planting calendar for ZIP 94928 (Rohnert Park, CA)

When to plant vegetables in Rohnert Park, CA (USDA hardiness zone 9a). Typical last spring frost around Feb 25, 2026 26 days year to year), first fall frost around Dec 1, 202617 days).

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

See the full Rohnert Park, CA planting calendar for dates typical of the whole city.

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Month by month in Rohnert Park, CA

January

February

March

April

September

December

Understand your frost dates

Frost dates for ZIP 94928: NOAA 1991-2020 normals (USC00047965 SANTA ROSA, CA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.