San Antonio, TX Planting Calendar & Frost Dates

When to plant vegetables in San Antonio

Vegetable	Start seeds indoors	Plant outside	Fall crop
Tomatoes	Jan 6 – Jan 20	Mar 3 – Mar 17	—
Peppers	Dec 30 – Jan 13	Mar 10 – Mar 24	—
Eggplant	Dec 30 – Jan 13	Mar 10 – Mar 24	—
Cucumbers	—	Mar 3 – Mar 17	—
Zucchini & summer squash	—	Mar 3 – Mar 17	—
Pumpkins & winter squash	—	Mar 10 – Mar 24	—
Green beans	—	Mar 3 – Mar 17	—
Sweet corn	—	Mar 3 – Mar 17	—
Basil	Jan 20 – Feb 3	Mar 3 – Mar 17	—
Lettuce	Dec 23 – Jan 6	Jan 20 – Mar 3	—
Spinach	—	Jan 6 – Jan 27	—
Peas	—	Jan 6 – Jan 27	—
Carrots	—	Jan 20 – Feb 24	—
Radishes	—	Jan 13 – Mar 3	—
Broccoli	Dec 9 – Dec 23	Jan 20 – Feb 3	—
Kale	Dec 23 – Jan 6	Jan 13 – Jan 27	—
Onions	—	Jan 20 – Feb 3	—
Potatoes	—	Jan 27 – Feb 24	—
Garlic	—	—	—

Dates count from the median frost dates (2016–2025) for San Antonio. In a cold spring, wait a week; in a warm one you can go a week early.

JanuaryStart indoors: Tomatoes, Peppers, Eggplant, Basil, Lettuce, KalePlant outside: Lettuce, Spinach, Peas, Carrots, Radishes, Broccoli, Kale, Onions, Potatoes
FebruaryStart indoors: BasilPlant outside: Lettuce, Carrots, Radishes, Broccoli, Onions, Potatoes
MarchPlant outside: Tomatoes, Peppers, Eggplant, Cucumbers, Zucchini & summer squash, Pumpkins & winter squash, Green beans, Sweet corn, Basil, Lettuce, Radishes
AprilPlan, order seeds and prepare beds.
MayPlan, order seeds and prepare beds.
JunePlan, order seeds and prepare beds.
JulyPlan, order seeds and prepare beds.
AugustPlan, order seeds and prepare beds.
SeptemberPlan, order seeds and prepare beds.
OctoberPlan, order seeds and prepare beds.
NovemberPlan, order seeds and prepare beds.
DecemberStart indoors: Peppers, Eggplant, Lettuce, Broccoli, Kale

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The median last spring frost is Feb 17, based on 2016–2025 weather data.

Start seeds indoors Jan 6 – Jan 20 and set plants outside Mar 3 – Mar 17, once nights stay above 50°F.