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San Mateo, CA planting calendar

When to plant vegetables in San Mateo, CA (USDA hardiness zone 10a). Typical last spring frost around Jan 17, 2026 23 days year to year), first fall frost around Dec 12, 202620 days).

Playing it safe? Spring frost holds off until about Feb 15, 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 San Mateo, CA’s first frost (~Dec 12, 2026) — fastest first.

Month by month in San Mateo, CA

January

February

March

September

October

November

December

Understand your frost dates

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