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Planting calendar for ZIP 78266 (San Antonio, TX)

When to plant vegetables in San Antonio, TX (USDA hardiness zone 9a). Typical last spring frost around Feb 21, 2026 25 days year to year), first fall frost around Dec 5, 202618 days).

Playing it safe? Spring frost holds off until about Mar 25, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full San Antonio, TX planting calendar for dates typical of the whole city.

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Month by month in San Antonio, TX

January

February

March

April

September

October

December

Understand your frost dates

Frost dates for ZIP 78266: NOAA 1991-2020 normals (USW00012911 RANDOLPH AFB, TX US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.