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Planting calendar for ZIP 85378 (Surprise, AZ)

When to plant vegetables in Surprise, AZ (USDA hardiness zone 9b). Typical last spring frost around Jan 14, 2026 21 days year to year), first fall frost around Dec 22, 202620 days).

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

See the full Surprise, AZ planting calendar for dates typical of the whole city.

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Month by month in Surprise, AZ

January

February

September

October

November

December

Understand your frost dates

Frost dates for ZIP 85378: NOAA 1991-2020 normals (USC00024829 LAVEEN 3 SSE, AZ US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.