Brussels Sprouts in Zone 6B — Texas

Growing Brussels sprouts in Texas might sound crazy, but it's totally doable, and the fresh, nutty flavor is so worth it. These little cabbages are fantastic roasted, shredded in salads, or even grilled, and there's something deeply satisfying about harvesting your own homegrown veggies right here in our unpredictable Texas weather.

Sure, we've got the Texas heat and occasional drought to contend with, but our long 230-day growing season gives you a real advantage. With careful timing, you can absolutely enjoy a Brussels sprouts harvest.

To get a head start on the season and beat the worst of the Texas heat, start your Brussels sprouts indoors in early to late February. This gives you about 6 weeks to get those seedlings strong before transplanting.

Use seed trays with a good seed-starting mix, and keep them warm and consistently moist. Bottom watering is a great way to keep the soil damp without disturbing the tiny sprouts – just set the tray in a shallow dish of water until the top of the soil is moist. Because spring can arrive early here, getting these seeds going indoors is key.

Transplant your Brussels sprouts seedlings outdoors in late March through mid April. Before you do, be sure to harden them off by gradually exposing them to outdoor conditions for about a week.

Space the plants 18-24 inches apart in a spot that gets plenty of sun. Keep an eye on the weather forecast – late freezes can still happen, so be ready to cover your plants if needed.

Brussels sprouts need consistent moisture, especially when they're forming those little sprouts. Drought stress can lead to loose, bitter sprouts, which nobody wants.

During the hot Texas summers, you'll likely need to water deeply 2-3 times a week, providing about 1-2 inches of water each time. Use the finger test: stick your finger about 2 inches into the soil. If it feels dry, it's time to water. Watering at the base of the plant is best to avoid fungal diseases that can thrive in our variable humidity.

Signs of underwatering include wilting leaves and slow growth. Overwatering can cause yellowing leaves and root rot. A good layer of mulch around the plants helps retain moisture and keeps the soil cooler during the intense summer heat.

Brussels sprouts can get tall and top-heavy, especially when those sprouts start to develop. All that weight, combined with our gusty Texas winds, can easily topple them over.

Staking is your best bet for support. Use sturdy stakes (like bamboo or metal) and tie the main stalk to the stake with soft twine. Install the stakes when the plants are around 2 feet tall to provide support as they grow.

Pruning Brussels sprouts is pretty straightforward. As the sprouts start to develop up the stalk, remove the yellowing or damaged lower leaves. This helps improve air circulation and directs the plant's energy towards sprout production.

About 3-4 weeks before you plan to harvest, top the plant by cutting off the top cluster of leaves. This forces the plant to put its energy into ripening the sprouts. With our first frost usually around early November, you'll want to top your plants in plenty of time.

You can expect your first Brussels sprouts harvest in late June through early August, about 90 days after transplanting. The sprouts are ready to pick when they're firm, tight, and about 1-2 inches in diameter.

Harvest from the bottom up, twisting or cutting the sprouts off the stalk. Don't be afraid of a light frost! The flavor of Brussels sprouts actually improves after a frost, becoming sweeter and less bitter. Continue harvesting as long as the weather allows. If a hard freeze is coming, you can harvest the entire stalk and store it in a cool, dark place.

• Aphids
• What it looks like: Clusters of tiny green, black, or white bugs on stems and undersides of leaves. You might also see sticky honeydew and curled, distorted new growth.
• What causes it: These sap-sucking insects reproduce rapidly, especially in warm weather. Ants often "farm" them for their honeydew.
• How to fix/prevent it: Blast them off with a strong stream of water. Encourage beneficial insects like ladybugs. Use insecticidal soap or neem oil for heavy infestations. Avoid over-fertilizing with nitrogen.
• Cabbage Worms
• What it looks like: Smooth green caterpillars chewing holes in leaves. You'll see dark green droppings and white butterflies fluttering around.
• What causes it: These are the larvae of those cute white cabbage butterflies. They can have multiple generations in our long, warm growing season.
• How to fix/prevent it: Use Bt spray, which is very effective. Floating row covers will keep the butterflies from laying eggs. Handpick the caterpillars and plant aromatic herbs like thyme and sage to deter them.
• Loose Sprouts from Heat
• What it looks like: Instead of tight, firm sprouts, you get loose, leafy ones that never fully develop. They can also taste bitter.
• What causes it: The intense Texas heat stresses the plants, preventing them from forming properly. Inconsistent watering also contributes.
• How to fix/prevent it: Choose heat-tolerant varieties. Provide consistent moisture, especially during the hottest part of the summer. Use shade cloth to protect plants from the harshest afternoon sun.
• Clubroot
• What it looks like: Stunted growth, wilting in the afternoon, and yellowing leaves. The roots will be swollen, distorted, and club-shaped.
• What causes it: This is caused by a soil-borne pathogen that can live in the soil for over 10 years. It thrives in acidic, wet soil.
• How to fix/prevent it: Raise the soil pH to 7.0-7.2 with lime. Improve drainage. Rotate your brassica crops on a 7-year cycle. Remove and destroy infected plants.

Texas Specific Challenges: The hot-to-extreme Texas heat, variable humidity, and unpredictable rainfall can make growing Brussels sprouts tricky. Consistent watering is crucial to prevent heat stress and loose sprouts. Be vigilant about pests, as they thrive in our warm climate.

Good companions for Brussels sprouts include green beans, celery, onions, potatoes, and dill. Green beans fix nitrogen in the soil, which benefits Brussels sprouts. Celery deters cabbage white butterflies. Onions and dill repel aphids and other pests. Potatoes don't compete for the same nutrients.

Avoid planting Brussels sprouts near tomatoes, strawberries, and peppers. Tomatoes and peppers can attract similar pests and diseases. Strawberries can stunt the growth of Brussels sprouts.