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Planting calendar for ZIP 92335 (Fontana, CA)

When to plant vegetables in Fontana, CA (USDA hardiness zone 10a). Typical last spring frost around Jan 4, 2026 (±21 days year to year), first fall frost around Dec 30, 2026 (±20 days).

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

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

Turn these dates into a plan: lay out your beds, place each crop on its sow and transplant dates, and get a reminder when it’s time. Free on one garden, no credit card.

Plan my garden for 92335

Month by month in Fontana, CA

January

February

October

November

December

Understand your frost dates

Where these dates come from

Frost dates for ZIP 92335 come from NOAA 1991-2020 normals (USW00003102 ONTARIO INTL AP, CA US). You can look up that station’s record yourself.

Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.