When to Plant Cabbage in Port Arthur, TX
Published: April 24, 2026
Cabbage Planting Dates for Port Arthur, TX
| Start seeds indoors | December 12–19 |
| Last frost (average) | January 30 |
| Transplant outdoors | January 9–19 |
| Minimum soil temperature | 45°F |
| Expect first harvest | March 10 – April 19 |
| 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 Port Arthur, TX
Consult a Port Arthur-area nursery or your state extension office for cabbage varieties proven in Zone 9a.
Growing Cabbage in Port Arthur
Port Arthur sits in Zone 9a, with an average last frost of January 30 and first fall frost around December 15 — giving a 319-day frost-free growing season. Cool-season crops like cabbage benefit from Port Arthur'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 Port Arthur'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 Port Arthur, not April through June.
Port Arthur'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 Port Arthur
| Month | Task |
|---|---|
| December | Start seeds indoors under grow lights |
| 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 Port Arthur 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 Port Arthur during October through February — spring plantings bolt before producing a usable crop in warm zones.
Common Cabbage Pests in Port Arthur
- •Cabbage Worm — peaks June–August in Zone 9a (active March–October); green caterpillars on brassicas; apply Bt spray or use row covers.
- •Cabbage Looper — peaks June–August in Zone 9a (active March–October); loop-walking green caterpillars; Bt spray works well.
- •Aphid — peaks June–August in Zone 9a (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 Port Arthur
In Port Arthur'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 Port Arthur, TX?
In Port Arthur (Zone 9a), start cabbage seeds indoors around December 12–19 and transplant outdoors around January 9–19. The city's average last frost of January 30 is the anchor date — count 7 weeks back for seed starting and 3 weeks back for transplanting.
What zone is Port Arthur, TX for cabbage growing?
Port Arthur is USDA Zone 9a. For cabbage, this means a frost-free growing season of roughly 46 weeks running from January 30 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 Port Arthur?
Expect the first cabbage harvest in Port Arthur around March 10, with harvest continuing through April 19. 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 Port Arthur, TX?
From transplant or direct sow to first harvest, cabbage takes 60–100 days in Port Arthur's climate. Based on a typical planting date of January 9–19, expect your first harvest around March 10. Port Arthur's warm Zone 9a climate tends toward the faster end of this range — warmer soil and longer days accelerate maturity.
What soil does cabbage need in Port Arthur?
Port Arthur'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.