Cayenne Peppers in Zone 7B — Southeast

Cayenne peppers are a fantastic addition to any Zone 7B Southeast garden. Their fiery flavor adds a kick to your favorite dishes, and they're surprisingly versatile in the kitchen. Plus, there's nothing quite like the satisfaction of harvesting your own homegrown peppers after a long summer in the garden.

Our hot and humid summers, with their afternoon thunderstorms, can present some challenges, but don't let that discourage you. With a little planning and attention to timing, you can easily grow a bountiful crop of cayenne peppers during our long 235-day growing season. We'll focus on strategies to mitigate disease pressure and make the most of our climate.

Starting your cayenne pepper seeds indoors is the way to go here in the Southeast. Aim to sow your seeds from late January through mid-February. This gives them about 8 weeks to get a head start before transplanting outdoors.

You'll need seed trays or small pots, a good seed-starting mix, and a warm, sunny location or grow lights. Keep the soil consistently moist, but not soggy. Bottom watering is a great way to prevent damping off, which can be a problem in our humid climate. And remember, spring here is moderate, not a mad dash.

Once the danger of frost has passed, usually from early April through early May, it's time to transplant your cayenne pepper seedlings outdoors. Before you do, harden them off by gradually exposing them to the outdoor elements for about a week. This helps them adjust to the sun and wind, preventing transplant shock.

Plant your seedlings 18-24 inches apart in well-drained soil. Keep an eye on the weather forecast around transplant time. We sometimes get a late cold snap, so be prepared to cover your plants if necessary.

Consistent watering is key for healthy cayenne pepper plants, but it's important to get it right in our humid Southeast climate. Aim to provide about 1 inch of water per week, either through rainfall or irrigation. Stick your finger about 2 inches deep into the soil – if it feels dry, it's time to water.

During the hottest part of the summer, you might need to water more frequently. However, as the peppers begin to mature, slightly reduce watering to concentrate their heat and flavor. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases in our humid environment.

Signs of underwatering include wilting leaves and slow growth. Overwatering, on the other hand, can lead to yellowing leaves and root rot. Mulching around your plants with straw or pine straw helps to retain moisture and suppress weeds, but be sure to leave space around the stem to prevent rot.

Cayenne pepper plants can get quite tall and laden with fruit, so providing support is a good idea. An upright growth habit makes them a good candidate for staking.

A simple stake made of bamboo or wood works well. Install the stake at planting time, a few inches away from the stem, and gently tie the plant to it as it grows. This prevents the plant from leaning or breaking under the weight of the peppers, especially after a heavy afternoon thunderstorm.

Pinching off the first few flowers that appear on your cayenne pepper plants can encourage them to focus on vegetative growth early in the season. This results in a stronger, more productive plant later on.

Once the plants are established, you can let them flower and fruit freely. As the end of the season approaches in late October, before our first frost, you can remove any remaining flowers to encourage the plant to put its energy into ripening the existing peppers.

Get ready to harvest your first cayenne peppers from mid-June through late July, about 70 days after transplanting. The peppers are ready when they're a bright red color, 4-6 inches long, and have a slight wrinkle on their skin. They should snap off easily at the stem.

Harvesting regularly encourages the plant to produce more peppers. As the first frost approaches in early November, harvest any remaining peppers, even if they're still green. They'll ripen indoors if you place them in a paper bag with an apple or banana.

Here are some common problems you might encounter with cayenne peppers in the Southeast:

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 and tomatoes 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).

Pepper Weevils

• What it looks like: Small, brown beetles that chew holes in pepper buds, flowers, and fruit. You might see larvae inside the peppers.
• What causes it: These pests are attracted to pepper plants, especially in warm, humid conditions.
• How to fix/prevent it: Handpick the weevils off the plants. Use row covers to protect your plants. Insecticides labeled for pepper weevils can be used as a last resort.

Bacterial Spot

• What it looks like: Small, dark, water-soaked spots on leaves, stems, and fruit. The spots may have a yellow halo.
• What causes it: A bacterial disease that thrives in warm, humid conditions.
• How to fix/prevent it: Remove infected leaves and fruit. Avoid overhead watering. Apply copper-based fungicides preventatively.

Southeast Specific Challenges: The hot, humid summers and frequent rainfall in the Southeast create ideal conditions for fungal diseases and pest infestations. Be vigilant about monitoring your plants and take action quickly to prevent problems from spreading. Our clay soil can also be a challenge, so amend it with plenty of organic matter to improve drainage. Japanese beetles can also be a problem, so consider using traps or handpicking them off your plants.

Companion planting can be beneficial for cayenne peppers. Tomatoes make good companions because they share similar growing requirements and can provide some shade during the hottest part of the day. Basil is another great choice, as it repels some pests and is said to improve the flavor of peppers. Carrots and onions can also be planted nearby to deter pests.

Avoid planting fennel or kohlrabi near your cayenne peppers. Fennel inhibits the growth of many plants, and kohlrabi can attract pests that also attack peppers.