Sweet Peppers in Zone 7B — Texas

Sweet peppers are a fantastic addition to any Texas garden. Their sweet flavor and versatility make them perfect for grilling, stuffing, or adding to your favorite Tex-Mex dishes. Plus, there's nothing quite like the satisfaction of harvesting your own sun-ripened peppers after nursing them through our long growing season.

Sure, Texas throws some curveballs our way with unpredictable weather and the brutal Texas heat, but don't let that scare you off. With a little planning and attention to timing, you can easily grow a bumper crop of sweet peppers. Our 255-day growing season gives you plenty of time to get it right, and even squeeze in a second crop.

Starting your sweet pepper seeds indoors is the way to go in Texas. Get those seeds going from mid January through early February, about 8 weeks before you plan to put them in the ground. That gives them a good head start before the Texas heat really kicks in.

You'll need some seed trays, a good seed-starting mix, and a warm, bright spot. A heat mat underneath the trays can speed up germination. Once the seedlings emerge, make sure they get plenty of light – a grow light works wonders. Don't forget to water from the bottom, letting the soil soak up moisture through the tray. This encourages strong root development.

Remember, spring comes early here, so starting your peppers indoors in January or February allows you to get a jump on the season and ensures a good harvest before the worst of the summer heat arrives.

Transplanting your sweet pepper seedlings outdoors is a big step. Aim to transplant them from late March through late April, after the last threat of frost has passed.

Before you plant them, you'll need to harden them off. This means gradually exposing them to outdoor conditions over about a week. Start with an hour or two of shade and slowly increase the amount of sun and wind they get each day. When you're ready to plant, space them about 18-24 inches apart in well-drained soil. Keep an eye on the weather, because we can still get some unpredictable cold snaps that time of year.

Watering is critical for sweet peppers in Texas, especially during the hot summer months. They need consistent moisture to produce those thick, sweet walls we all love. Inconsistent watering will stress the plants and affect the flavor.

During the spring, when temperatures are milder, water deeply once or twice a week, providing about 1 inch of water each time. As the Texas heat ramps up, you'll likely need to water more frequently, possibly every other day or even daily during the hottest stretches. Stick your finger about 2 inches deep into the soil – if it feels dry, it's time to water. Water at the base of the plant to avoid wetting the foliage, especially with our variable humidity, which can encourage fungal diseases.

Signs of underwatering include wilting leaves and dry, cracked soil. Overwatering can lead to yellowing leaves and root rot. A good layer of mulch around your plants will help retain moisture and keep the soil cool.

While not always necessary, staking sweet peppers can be a good idea, especially for larger varieties that get loaded down with fruit. The weight of the peppers can cause branches to break, so providing some support can prevent this.

Tomato cages or individual stakes work well. Install the support at planting time to avoid disturbing the roots later. As the plants grow, gently tie the stems to the support with soft twine or plant ties. This will help keep the plants upright and prevent the fruit from touching the ground.

Sweet peppers don't require a lot of pruning, but a little bit of pinching can help them produce more fruit. When the plants are young, pinch off the first few flowers that appear. This encourages the plant to focus on developing a strong root system and foliage, which will ultimately lead to higher yields later in the season.

Avoid removing too much foliage, as the leaves help shade the fruit and protect it from sunscald. As the end of the season approaches (around mid- November), you can remove any remaining flowers to encourage the plant to ripen the existing peppers before the first frost.

Get ready to harvest your first sweet peppers from late May through mid July, about 65 days after transplanting. The peppers are ready to pick when they've reached their full size and color for the variety. They'll also get sweeter the longer you leave them on the plant.

To harvest, use a sharp knife or pruners to cut the pepper from the stem, leaving a small piece of stem attached to the pepper. Avoid pulling the peppers off, as this can damage the plant. Regular harvesting encourages continued production, so keep picking those peppers as they ripen.

As the first frost approaches (mid- November), harvest any remaining peppers, even if they're not fully ripe. You can ripen them indoors by placing them in a paper bag with an apple or banana.

Even with the best care, sweet peppers can run into a few problems in Texas:

• Blossom Drop
• What it looks like: Flowers fall off without setting fruit. Small fruit yellows and drops. Plant looks healthy but produces no fruit.
• What causes it: Temperature stress. Peppers don't set fruit well when nights stay above 75°F or days exceed 95°F. Also caused by low humidity, excess nitrogen, or poor pollination.
• How to fix/prevent it: Be patient – fruit set resumes when temperatures moderate. Provide afternoon shade during extreme heat. Keep plants well-watered. Avoid excess nitrogen. Try hand-pollination.
• Aphids
• What it looks like: Clusters of tiny soft-bodied insects (green, black, or white) on stems and leaf undersides. Sticky honeydew residue. Curled or distorted new growth.
• What causes it: Rapid-reproducing sap-sucking insects. Populations explode in warm weather. Ant colonies may farm them for honeydew.
• How to fix/prevent it: Strong water spray knocks them off. Encourage ladybugs and lacewings (natural predators). Insecticidal soap for heavy infestations. Neem oil works systemically. Avoid excess nitrogen fertilizer (it attracts them). And watch out for those fire ants protecting them!
• Sunscald
• What it looks like: White, papery patches on fruit exposed to direct sun. Affected areas may blister and become susceptible to rot.
• What causes it: Intense, direct sunlight on fruit — usually after leaves are removed or lost to disease, suddenly exposing previously shaded fruit.
• How to fix/prevent it: Don't over-prune foliage. Use shade cloth in extreme heat. Maintain healthy foliage to shade fruit naturally. If fruit is already exposed, drape a small piece of row cover over it.
• Blossom End Rot
• What it looks like: Sunken, dark brown or black leathery patch on the bottom (blossom end) of fruit. Often affects first fruits of the season.
• What causes it: Calcium deficiency caused by inconsistent watering. Not a disease — it's a nutrient uptake problem triggered by drought/flood cycles.
• How to fix/prevent it: Water consistently (the single most effective fix). Mulch heavily to maintain even soil moisture. Don't over-fertilize with nitrogen. Calcium sprays help marginally. Remove affected fruit.

Texas Specific Challenges: The hot-to-extreme Texas heat, variable humidity, and unpredictable rainfall can make growing sweet peppers challenging. High temperatures can cause blossom drop and sunscald, while inconsistent watering can lead to blossom end rot. Vigilance and proactive measures are key to overcoming these challenges.

Companion planting can really help your sweet peppers thrive here in Texas. Tomatoes are great companions because they share similar growing requirements and can provide some shade during the hottest part of the day. Basil is another good choice – it repels pests like aphids and also improves the flavor of your peppers. Carrots and onions can also help deter pests, while spinach can act as a ground cover, helping to retain moisture in the soil.

Avoid planting fennel, kohlrabi, or brassicas (like cabbage and broccoli) near your sweet peppers. Fennel inhibits the growth of many plants, while kohlrabi and brassicas compete for the same nutrients in the soil.