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Port Isabel, TX planting calendar

When to plant vegetables in Port Isabel, TX (USDA hardiness zone 10a). Typical last spring frost around Jan 3, 2026 21 days year to year), first fall frost around Jan 1, 202622 days).

Playing it safe? Spring frost holds off until about Jan 29, 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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Month by month in Port Isabel, TX

January

February

October

November

December

Understand your frost dates

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ZIP codes in Port Isabel

78578

Frost dates are NOAA 1991–2020 climate normals for a representative location in Port Isabel, TX (covering 1 ZIP); your exact dates depend on your address. Schedules are guidance, not guarantees.