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Rancho Cucamonga, CA planting calendar

When to plant vegetables in Rancho Cucamonga, CA (USDA hardiness zone 10a). Typical last spring frost around Jan 4, 2026 21 days year to year), first fall frost around Dec 30, 202620 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.

Want exact dates for your address, a drag-and-drop bed layout, and reminders when it’s time to sow? Enter your ZIP:

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Still time to plant

As of today, these crops can still reach harvest before Rancho Cucamonga, CA’s first frost (~Dec 30, 2026) — fastest first.

Month by month in Rancho Cucamonga, CA

January

February

October

November

December

Understand your frost dates

Frost dates are NOAA 1991–2020 climate normals for a representative location in Rancho Cucamonga, CA (covering 4 ZIPs); your exact dates depend on your address. Schedules are guidance, not guarantees.