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Planting calendar for ZIP 78384 (San Diego, TX)

When to plant vegetables in San Diego, TX (USDA hardiness zone 9b). Typical last spring frost around Feb 20, 2026 21 days year to year), first fall frost around Dec 1, 202620 days).

Playing it safe? Spring frost holds off until about Mar 18, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in San Diego, TX

January

February

March

April

September

November

December

Understand your frost dates

Frost dates for ZIP 78384: NOAA 1991-2020 normals (USC00410690 BENAVIDES 2, TX US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.