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Walnut Creek, CA planting calendar

When to plant vegetables in Walnut Creek, CA (USDA hardiness zone 9b). Typical last spring frost around Jan 7, 2026 17 days year to year), first fall frost around Dec 19, 202616 days).

Playing it safe? Spring frost holds off until about Jan 28, 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 Walnut Creek, CA’s first frost (~Dec 19, 2026) — fastest first.

Month by month in Walnut Creek, CA

January

February

September

October

November

December

Understand your frost dates

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