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Planting calendar for ZIP 93257 (Porterville, CA)

When to plant vegetables in Porterville, CA (USDA hardiness zone 9b). Typical last spring frost around Jan 20, 2026 23 days year to year), first fall frost around Dec 13, 202616 days).

Playing it safe? Spring frost holds off until about Feb 18, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Porterville, CA

January

February

March

September

October

November

December

Understand your frost dates

Frost dates for ZIP 93257: NOAA 1991-2020 normals (USC00047077 PORTERVILLE, CA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.