Cabbage in Zone 8A — Texas

Cabbage is a surprisingly rewarding crop for Texas gardeners. Nothing beats the crisp, homegrown flavor in slaws, stir-fries, or even just a simple wedge roasted with olive oil. Plus, you can get two crops in during our long growing season if you time it right, taking advantage of our mild winters and early springs.

Sure, the Texas heat and unpredictable weather can be tough, but with a little planning, you can absolutely grow beautiful heads of cabbage. Our 260-day growing season gives us a nice window to work with, so let’s get started.

Start your cabbage seeds indoors in early to late January, about six weeks before you plan to transplant them outside. This gives them a head start before the worst of the Texas heat arrives. Use seed trays or small pots filled with a good seed-starting mix.

Keep the soil consistently moist, and consider bottom watering to prevent damping-off. Place the trays in a warm location, and once the seedlings emerge, provide plenty of light – a grow light works great. Our early spring warmth can be deceiving, so starting indoors protects them from any late freezes.

Transplant your cabbage seedlings outdoors from mid February through mid March. Before transplanting, harden them off by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the Texas sun and wind.

Space the plants 12-18 inches apart in a sunny spot with well-drained soil. Be mindful of unexpected cold snaps – have some frost cloth ready to protect your young plants if needed.

Watering is critical for cabbage, especially in our variable Texas climate. Aim for consistent moisture to prevent the heads from splitting. The "finger test" is your friend – stick your finger about two inches into the soil; if it feels dry, it's time to water.

During the spring, aim for about 1-1.5 inches of water per week, either from rainfall or irrigation. Water at the base of the plants rather than overhead, especially during periods of high humidity, to reduce the risk of fungal diseases. In the hotter months, you might need to water more frequently.

Signs of underwatering include wilting leaves and stunted growth. Overwatering, on the other hand, can lead to root rot and yellowing leaves. A good layer of mulch, like shredded leaves or straw, helps retain moisture and regulate soil temperature, which is a lifesaver during the Texas heat.

Your first cabbage harvest should be in late April through mid June, about 70 days after transplanting. A good sign that your cabbage is ready to harvest is when the head feels firm and solid when you squeeze it. It should also be close to the full size expected for the variety you're growing.

To harvest, simply cut the head at the base with a sharp knife. Leaving the lower leaves intact can sometimes encourage smaller side shoots to develop, giving you a bonus mini-harvest later on.

As our first frost approaches around mid- November, harvest any remaining heads, even if they're not quite fully mature. Smaller cabbages are still delicious! You can also shred and ferment them into sauerkraut for longer storage.

Here are some common problems you might encounter growing cabbage in Texas:

Cabbage Worms

• What it looks like: Smooth green caterpillars on brassica leaves. Irregular holes chewed in leaves. Dark green droppings. White butterflies hovering around plants.
• What causes it: Larvae of white cabbage butterflies. Multiple generations per season in our warm climate.
• How to fix/prevent it: Bt spray is very effective. Floating row covers prevent egg laying. Handpick caterpillars. Interplant with aromatic herbs (thyme, sage). Encourage parasitic wasps.

Cabbage Loopers

• What it looks like: Similar to cabbage worms, but these caterpillars move in a looping motion. They also chew holes in leaves.
• What causes it: These are also larvae of a moth, and they thrive in warm weather.
• How to fix/prevent it: Use Bt spray, handpick them off the plants, and use row covers to prevent the moths from laying eggs.

Splitting

• What it looks like: The cabbage head cracks open.
• What causes it: Inconsistent watering. A sudden heavy rain after a dry spell causes the head to grow too quickly, splitting the outer leaves.
• How to fix/prevent it: Maintain consistent soil moisture. Mulch well to retain moisture. If a heavy rain is predicted, consider harvesting mature heads early.

Clubroot

• What it looks like: Stunted growth, wilting in afternoon heat, yellowing leaves. Roots are swollen, distorted, and club-shaped when dug up.
• What causes it: Soil-borne pathogen (Plasmodiophora brassicae) that persists in soil for 10+ years. Favors acidic, wet soil.
• How to fix/prevent it: Raise soil pH to 7.0-7.2 with lime. Improve drainage. Rotate brassicas on a 7-year cycle. Remove and destroy infected plants (don't compost). Start transplants in sterile mix.

Texas Specific Challenges: The hot-to-extreme heat, variable humidity, and unpredictable rainfall in Texas can all stress cabbage plants, making them more susceptible to pests and diseases. Consistent monitoring and proactive measures are key to a successful harvest. And watch out for those fire ants when you're working in the garden!

Companion planting can really help your cabbage thrive here in Texas. Green beans are a great companion because they fix nitrogen in the soil, which cabbage loves. Celery can deter cabbage white butterflies, reducing the risk of cabbage worms. Onions and dill also help repel pests. Potatoes are neutral, as they don't compete for nutrients in the same way.

Avoid planting cabbage near tomatoes, strawberries, or peppers. Tomatoes and peppers can stunt the growth of cabbage, and strawberries compete for the same nutrients in the soil.