When to Plant Cabbage in San Antonio, TX
Published: April 24, 2026
Cabbage Planting Dates for San Antonio, TX
| Start seeds indoors | December 14–21 |
| Last frost (average) | February 1 |
| Transplant outdoors | January 11–21 |
| Minimum soil temperature | 45°F |
| Expect first harvest | March 12 – April 21 |
| Fall crop planting | September 22–October 2 |
| Fall crop harvest | November 21 |
| First fall frost (average) | December 15 |
⚠ Start cabbage indoors 6–8 weeks before last frost. Transplant 2–4 weeks before last frost. Very frost tolerant — withstands temperatures as low as 20°F. Also plant in late summer for fall harvest.
Best Cabbage Varieties for San Antonio, TX
Consult a San Antonio-area nursery or your state extension office for cabbage varieties proven in Zone 8b.
Growing Cabbage in San Antonio
San Antonio sits in Zone 8b, with an average last frost of February 1 and first fall frost around December 15 — giving a 317-day frost-free growing season. Cool-season crops like cabbage benefit from San Antonio's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
In San Antonio's warm climate, cabbage works best as a fall, winter, and early-spring crop. Summer heat bolts most cool-season vegetables before they can produce a harvestable head or root. Plan primary plantings in October through February in San Antonio, not April through June.
San Antonio's heavy clay soil benefits from raised beds or deep organic matter amendment before planting cabbage. Clay retains moisture well but compacts easily — add 3 to 4 inches of compost and work it in to 12 inches before planting. Consistent watering (1.5 inches per week) is especially important in clay soil, which can crack and pull away from roots during dry spells; mulch around plants to stabilize moisture.
Cabbage Calendar for San Antonio
| Month | Task |
|---|---|
| December | Start seeds indoors under grow lights |
| February | Last frost — harden off seedlings outdoors |
| January | Transplant outdoors into warm soil |
| March | Expect first harvest window to open |
| September | Start fall crop — transplants or direct sow |
| December | First fall frost — harvest remaining, end of outdoor season |
Cabbage Tips for San Antonio Gardeners
- •Space plants 18 inches apart — crowding reduces head size and promotes fungal disease.
- •Side-dress with nitrogen 3–4 weeks after transplanting to support rapid leaf formation.
- •Plant cool-season cabbage in San Antonio during October through February — spring plantings bolt before producing a usable crop in warm zones.
Common Cabbage Pests in San Antonio
- •Cabbage Worm — peaks June–August in Zone 8b (active March–October); green caterpillars on brassicas; apply Bt spray or use row covers.
- •Cabbage Looper — peaks June–August in Zone 8b (active March–October); loop-walking green caterpillars; Bt spray works well.
- •Aphid — peaks June–August in Zone 8b (active March–October); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Cabbage in San Antonio
In San Antonio's warm climate, Onion and Dill are the most beneficial plants to grow alongside cabbage. Onion deters carrot fly, aphids, and several root-zone pests through sulfur compounds. Keep cabbage away from Tomato — it competes for nutrients or shares pest pressure. Warm-climate gardeners especially benefit from dense, layered companion plantings that shade soil and reduce water loss.
Frequently Asked Questions
When should I plant cabbage in San Antonio, TX?
In San Antonio (Zone 8b), start cabbage seeds indoors around December 14–21 and transplant outdoors around January 11–21. The city's average last frost of February 1 is the anchor date — count 7 weeks back for seed starting and 3 weeks back for transplanting.
What zone is San Antonio, TX for cabbage growing?
San Antonio is USDA Zone 8b. For cabbage, this means a frost-free growing season of roughly 45 weeks running from February 1 to December 15. Cool-season crops like cabbage thrive in this zone with both spring and fall planting windows available.
When is cabbage harvest season in San Antonio?
Expect the first cabbage harvest in San Antonio around March 12, with harvest continuing through April 21. This is based on 60–100 days from transplant or direct sow. A fall crop planted September 22–October 2 adds a second harvest around November 21.
How long does it take to grow cabbage in San Antonio, TX?
From transplant or direct sow to first harvest, cabbage takes 60–100 days in San Antonio's climate. Based on a typical planting date of January 11–21, expect your first harvest around March 12. San Antonio's warm Zone 8b climate tends toward the faster end of this range — warmer soil and longer days accelerate maturity.
What soil does cabbage need in San Antonio?
San Antonio's heavy clay soil compacts easily and drains slowly — problematic for cabbage which needs oxygenated roots. Build a raised bed or amend deeply with 3–4 inches of compost worked into the top 12 inches. Add gypsum if the soil is severely compacted. Consistent watering matters especially in clay because the soil can crack and pull away from roots during dry spells.