Calendars by city / TX
San Antonio, Texas vegetable planting calendar
Planting windows for San Antonio, Texas built from the NOAA 1991–2020 freeze normals at SAN ANTONIO INTERNATIONAL AIRPORT, TX US (station USW00012921), not from a hardiness zone.
San Antonio, Texas planting dates for 27 vegetables
The same windows as a table
Each row applies a published extension rule to the frost dates above. Hardy crops go out 2–4 weeks before the last frost; semi-hardy crops 0–2 weeks before; tender crops around the frost date; very tender crops 2 or more weeks after. The last fall planting date counts the crop's days to harvest back from the first fall frost. The rules and their sources are on the methodology page.
| Crop | Frost class | Start seeds indoors | Plant outdoors | Last fall planting | Days to harvest |
|---|---|---|---|---|---|
| Beets | Semi-hardy | — (direct sow) | Direct sow: Feb 15 – Mar 1 | Oct 9 | 60 |
| Broccoli | Hardy | Dec 14 – Jan 11 | Transplant: Feb 1 – Feb 15 | Oct 11 | 65 (from transplant) |
| Cabbage | Hardy | Dec 14 – Jan 11 | Transplant: Feb 1 – Feb 15 | Sep 21 | 85 (from transplant) |
| Carrots | Semi-hardy | — (direct sow) | Direct sow: Feb 15 – Mar 1 | Sep 29 | 70 |
| Cauliflower | Semi-hardy | Dec 28 – Jan 25 | Transplant: Feb 15 – Mar 1 | Oct 4 | 65 (from transplant) |
| Kohlrabi | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Oct 26 | 50 |
| Lettuce (leaf) | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Oct 16 | 60 |
| Onions (green) | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Oct 16 | 60 |
| Onions (dry, from seed) | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Aug 27 | 110 |
| Onions (dry, from sets) | Hardy | — (direct sow) | Plant sets: Feb 1 – Feb 15 | Aug 27 | 110 |
| Parsnips | Semi-hardy | — (direct sow) | Direct sow: Feb 15 – Mar 1 | Sep 29 | 70 |
| Peas | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Oct 11 | 65 |
| Potatoes | Semi-hardy | — (direct sow) | Plant seed potatoes: Feb 15 – Mar 1 | Aug 5 | 125 |
| Radishes | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Nov 15 | 30 |
| Spinach | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Nov 5 | 40 |
| Swiss chard | Semi-hardy | — (direct sow) | Direct sow: Feb 15 – Mar 1 | Oct 9 | 60 |
| Turnips | Hardy | — (direct sow) | Direct sow: Feb 1 – Feb 15 | Oct 26 | 50 |
| Snap beans | Tender | — (direct sow) | Direct sow: Mar 1 – Mar 8 | Oct 2 | 60 |
| Cantaloupe | Very tender | Feb 22 – Mar 15 | Direct sow (or transplant): Mar 15 – Mar 29 | Sep 7 | 85 |
| Sweet corn | Tender | — (direct sow) | Direct sow: Mar 1 – Mar 8 | Sep 2 | 60–90 |
| Cucumbers | Tender | Feb 8 – Feb 22 | Direct sow (or transplant): Mar 1 – Mar 8 | Oct 7 | 55 |
| Eggplant | Very tender | Jan 11 – Feb 15 | Transplant: Mar 15 – Mar 29 | Oct 2 | 60 (from transplant) |
| Peppers | Very tender | Jan 18 – Feb 15 | Transplant: Mar 15 – Mar 29 | Sep 22 | 70 (from transplant) |
| Tomatoes | Very tender | Jan 25 – Feb 22 | Transplant: Mar 15 – Mar 29 | Sep 27 | 65 (from transplant) |
| Summer squash | Tender | Feb 8 – Feb 22 | Direct sow (or transplant): Mar 1 – Mar 8 | Oct 12 | 50 |
| Winter squash | Very tender | Feb 22 – Mar 15 | Direct sow (or transplant): Mar 15 – Mar 29 | Aug 23 | 100 |
| Watermelon | Very tender | Feb 22 – Mar 15 | Direct sow (or transplant): Mar 15 – Mar 29 | Sep 7 | 85 |
What the San Antonio, Texas frost-free season means for your choices
At 275 frost-free days, San Antonio, Texas gardeners should compare that number to the days-to-harvest column before buying seed. A crop whose days to harvest plus its transplant age is close to the season length needs either an early start indoors or a short-season variety.
- Hardy crops (peas, spinach, radishes, lettuce, broccoli, cabbage) can go in from about Feb 1 – Feb 15 and again for fall.
- Very tender crops (tomatoes, peppers, eggplant, melons, winter squash) should wait until Mar 15 – Mar 29; start tomato seeds indoors Jan 25 – Feb 22.
- Fall sowing is worthwhile only for the rows that show a separate fall date; for the others the spring window already covers the season.
San Antonio, TX planting questions
When is the last frost in San Antonio, Texas?
The 50% probability date for the last spring 32°F reading at SAN ANTONIO INTERNATIONAL AIRPORT, TX US is Mar 1, from the NOAA 1991–2020 climate normals. In half the years on that record the last frost came later than that date, so tender crops are safer a week or two after it. The last 28°F hard freeze averages Feb 12.
When can I plant tomatoes in San Antonio, Texas?
Tomatoes are a very tender crop, so the Colorado State Extension rule puts them out 2 or more weeks after the last spring frost: Mar 15 – Mar 29 in San Antonio, Texas. Start the seeds indoors Jan 25 – Feb 22, which is 5 to 7 weeks before that transplant window.
How long is the growing season in San Antonio, Texas?
San Antonio, Texas averages 275 frost-free days, between the 50% last spring frost on Mar 1 and the 50% first fall frost on Dec 1 at SAN ANTONIO INTERNATIONAL AIRPORT, TX US. Check a variety's days to harvest against that number before buying seed.
When should I start seeds indoors in San Antonio, Texas?
The earliest indoor sowing on this calendar is broccoli and cabbage at Dec 14 – Jan 11. Hardy crops are transplanted out Feb 1 – Feb 15 here, and each crop's indoor window is simply its outdoor window minus the transplant age published by Colorado State Extension, so nothing starts earlier than that.
What can I plant in fall in San Antonio, Texas?
The crops with a separate fall sowing here, latest first, are radishes, spinach, kohlrabi, turnips, lettuce (leaf) and onions (green), plus 21 more on the chart above. Each fall date counts the crop's days to harvest back from the first fall frost on Dec 1, plus an allowance for frost-tolerant crops that is our own assumption, not the source's.
Station data and limitations
| NOAA station | SAN ANTONIO INTERNATIONAL AIRPORT, TX US (USW00012921) |
|---|---|
| Location | 29.5443, -98.4839 · elevation 240.5 m |
| Last spring 32°F / 28°F (50%) | Mar 1 / Feb 12 |
| First fall 32°F / 28°F (50%) | Dec 1 / Dec 13 |
| Dataset | NOAA/NCEI U.S. Climate Normals 1991–2020, annual/seasonal product, data types ANN-TMIN-PRBLST/PRBFST-T32FP50 and T28FP50 |
| Retrieved | 2026-10-16 |
The normals describe the airport station, not your yard. They are averages of a 30-year record and say nothing about this year's weather. Watch the local forecast around the dates shown, and use soil temperature for warm-season crops, which the Colorado State guide treats as the better signal.
Nearby calendars
- Austin, Texas — last spring frost Feb 19
- Houston, Texas — last spring frost Feb 18
- Dallas–Fort Worth, Texas — last spring frost Mar 8
- Oklahoma City, Oklahoma — last spring frost Mar 27
Read the method behind these dates: last frost date vs hardiness zone.