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Planting calendar for ZIP 78257 (San Antonio, TX)

When to plant vegetables in San Antonio, TX (USDA hardiness zone 9a). Typical last spring frost around Feb 26, 2026 18 days year to year), first fall frost around Nov 28, 202618 days).

Playing it safe? Spring frost holds off until about Mar 21, 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

November

December

Understand your frost dates

Frost dates for ZIP 78257: NOAA 1991-2020 normals (USW00012921 SAN ANTONIO INTL AP, TX US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.