Sweet Peppers in Zone 6B — Southeast

Sweet peppers are a fantastic addition to any Zone 6B garden here in the Southeast. Their sweet flavor and crisp texture make them perfect for grilling, salads, or just snacking straight from the garden. Plus, they thrive in our long summer and reliable rainfall, giving you a satisfying harvest.

Now, our hot and humid summers can bring challenges like fungal diseases and Japanese beetles. But with proper timing and a little extra care, you can absolutely enjoy a bumper crop of sweet peppers. Our 208-day growing season gives you plenty of time to get it right.

Starting sweet pepper seeds indoors is the way to go here in the Southeast to get a jump start on our growing season. Aim to start your seeds from mid February through early March, about eight weeks before you plan to transplant them outside. This gives them plenty of time to develop before our last frost.

Use seed trays or small pots filled with a good seed-starting mix. Keep them warm (around 75-80°F) and provide plenty of light – a grow light works wonders. Water from the bottom to avoid damping off, pouring water into the tray and letting the soil absorb it. Remember, spring here in the Southeast is moderate, not too hot, not too cold, so a sunny windowsill might do the trick, but watch those temperatures!

Transplant your sweet pepper seedlings outdoors from mid April through mid May, once the danger of frost has passed. Before planting, harden them off by gradually exposing them to outdoor conditions for about a week. This helps them adjust to the sun and wind, preventing transplant shock.

Space your pepper plants 18-24 inches apart in well-drained soil. We often have unexpected temperature swings in spring, so be ready to cover your transplants if a late frost threatens.

Consistent watering is key to growing sweet, thick-walled peppers here in the Southeast. Our hot and humid summers can be tough on plants, even with our wet-summer rainfall. Aim to keep the soil consistently moist but not waterlogged.

Check the soil moisture by sticking your finger about two inches deep. If it feels dry, it's time to water. Typically, sweet peppers need about 1-2 inches of water per week, depending on rainfall. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases in our humid climate.

Signs of underwatering include wilting leaves and slow growth. Overwatering can lead to yellowing leaves and root rot. Mulching around your pepper plants with straw or wood chips helps retain moisture and suppress weeds, which is especially important with our often-heavy summer rains.

While not always necessary, providing support for your sweet pepper plants can be beneficial, especially as they become laden with fruit. Some varieties get quite large and can topple over in our afternoon thunderstorms.

Stakes or tomato cages work well for supporting sweet peppers. Install them at planting time to avoid disturbing the roots later on. As the plant grows, gently tie the stems to the support with soft twine or plant tape.

Pinching off the first few flowers that appear on your sweet pepper plants can encourage stronger establishment and higher overall yields. It might seem counterintuitive, but removing those early flowers directs the plant's energy towards developing a strong root system and healthy foliage.

Simply pinch off the flowers as soon as you see them. Otherwise, leave the plant alone. As the first frost approaches around late October, you can remove any remaining small peppers to encourage the plant to focus its energy on ripening the larger ones.

You can expect your first sweet pepper harvest from late June through mid August, depending on when you transplanted your seedlings. Sweet peppers are generally ready to harvest about 65 days after transplanting. Look for peppers that have reached their full size and color for the variety you're growing.

The longer they ripen on the plant, the sweeter they become. To harvest, use pruners or scissors to cut the pepper from the plant, leaving a short stem attached. This prevents damage to the plant and encourages continued production.

Keep harvesting regularly to encourage more peppers to develop. As the first frost approaches in late October, harvest any remaining peppers, even if they're still green. They will ripen indoors if stored in a cool, dry place.

Sweet peppers, like any plant, can face some challenges here in the Southeast. Here are a few common problems to watch out for:

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).

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.

Southeast Specific Challenges: Our hot and humid summers create ideal conditions for fungal diseases on sweet peppers. Also, our wet-summer rainfall can make consistent watering a challenge. Be sure to provide good air circulation around your plants and monitor them closely for any signs of disease or pest problems.

Companion planting can be a great way to improve the health and productivity of your sweet peppers here in the Southeast. Tomatoes make excellent companions because they have similar growing requirements and can provide shade for each other during the hottest part of the day. Basil is another great choice, as it repels many common pests and attracts beneficial insects.

Carrots and onions also work well alongside sweet peppers. Carrots help loosen the soil, while onions deter pests. Spinach can be planted as a ground cover to help retain moisture and suppress weeds. 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 nutrients and attract pests that can also affect your peppers.