Bell Peppers in Zone 6B — Southeast

Bell peppers are a true garden staple, and in the Southeast, you can't beat the satisfaction of harvesting your own crisp, sweet peppers from a plant you nurtured. Their versatility in the kitchen, from stuffing to grilling, makes them a must-grow for our long summer.

Our hot and humid summers definitely present some challenges, but don't let that deter you. With a little planning and attention to timing, you can absolutely succeed. The Southeast's generous 208-day growing season gives you plenty of opportunity to enjoy a bountiful pepper harvest.

Starting bell pepper seeds indoors is the way to go in the Southeast. You'll want to get those seeds going indoors mid-February through early March, roughly eight weeks before you plan to transplant them outside. This gives them a strong head start.

Use seed trays with a good seed-starting mix, and keep them warm—a heat mat can be a real help. Bright light is essential, so a grow light is ideal, especially with our moderate spring sunshine. Don’t forget to water from the bottom to prevent damping off.

Once the danger of frost has passed—typically mid-April through mid-May here—it's time to transplant your pepper seedlings outdoors. Before you do, harden them off by gradually exposing them to outdoor conditions for about a week. This prevents transplant shock.

Space your plants 18 to 24 inches apart in well-draining soil. Keep an eye on the forecast for any late cold snaps, which can still happen this time of year. Be ready to cover your seedlings if needed.

Bell peppers need consistent moisture to produce those thick-walled, juicy fruits we all crave. Inconsistent watering leads to blossom end rot and thin pepper walls, so staying on top of it is key, especially with our unpredictable rainfall.

During the hotter parts of our long summer, you'll likely need to water your pepper plants deeply a couple times a week, aiming for about 1-2 inches of water each time. Stick your finger about two inches into the soil—if it feels dry, it's time to water. With our humid climate, it's best to water at the base of the plant to avoid creating a breeding ground for fungal diseases.

Signs of underwatering include wilting leaves and blossom drop. Overwatering, on the other hand, can lead to yellowing leaves and root rot. A good layer of mulch, like pine straw or shredded leaves, helps retain moisture and regulate soil temperature, which is a real benefit in our hot summers.

While bell peppers have a bush-like growth habit, those heavy fruits can sometimes weigh down the branches, especially after a good afternoon thunderstorm. Adding some support can help prevent them from toppling over.

A simple stake and some soft twine work great. Just insert the stake near the plant at planting time and gently tie the main stem to it as the plant grows. This is especially helpful once the peppers start to mature.

Pruning bell peppers isn't strictly necessary, but a little strategic pinching and trimming can improve your harvest. Pinch off any early flowers that appear before the plant is a foot tall. This encourages the plant to focus on vegetative growth first.

Throughout the season, remove any peppers that are touching the ground to prevent rot. Also, prune out some of the interior branches to improve airflow and reduce humidity within the plant, which can help prevent fungal diseases. As the first frost approaches in late October, you can remove any new flowers to encourage the plant to ripen existing fruit.

You can typically expect your first bell pepper harvest in late June through mid-August, about 70 days after transplanting. Peppers are green when immature, but they'll turn red, yellow, or orange as they fully ripen. For the sweetest flavor, wait until they've reached their mature color.

To harvest, use pruning shears or a sharp knife to cut the pepper from the plant, leaving a short stem attached. Regular harvesting encourages the plant to produce more peppers. As the first frost nears in late October, harvest any remaining mature peppers. Green peppers can ripen indoors if kept in a warm place.

Bell peppers can run into a few common problems in the Southeast, but knowing what to look for can help you tackle them head-on.

• Blossom End Rot
• What it looks like: A sunken, dark brown or black, leathery patch on the bottom of the pepper.
• What causes it: Calcium deficiency due to inconsistent watering, which is common with our cycles of heavy rain followed by hot, dry spells.
• How to fix/prevent it: Water consistently! Mulch heavily to maintain even soil moisture. Avoid over-fertilizing with nitrogen. Remove affected fruit.
• Blossom Drop
• What it looks like: Flowers fall off without setting fruit. Small fruit yellows and drops.
• What causes it: High temperatures, especially when nighttime temperatures stay above 75°F. Common during the peak of our summer heat.
• How to fix/prevent it: Be patient—fruit set will resume when temperatures moderate. Provide afternoon shade. Keep plants well-watered.
• Aphids
• What it looks like: Clusters of tiny green, black, or white insects on stems and leaf undersides. Sticky honeydew residue.
• What causes it: Warm weather and lush new growth. Aphids thrive in our long, humid summers.
• How to fix/prevent it: Strong water spray to knock them off. Encourage ladybugs. Insecticidal soap or neem oil for heavy infestations.
• Sunscald
• What it looks like: White, papery patches on fruit exposed to direct sun.
• What causes it: Intense sunlight on fruit, often after leaves are lost or pruned.
• How to fix/prevent it: Don't over-prune. Use shade cloth during extreme heat. Maintain healthy foliage.

Southeast Specific Challenges: The combination of hot heat and humid humidity in the Southeast creates a perfect environment for fungal diseases, so good airflow is crucial. Wet-summer rainfall patterns can also lead to inconsistent soil moisture, making blossom end rot and blossom drop more common.

Companion planting can be a real asset for your bell peppers in the Southeast. Tomatoes make great neighbors, as they have similar needs and can offer some shade during our hottest afternoons. Basil repels many pests and is said to improve the flavor of peppers, plus it thrives in our humid climate.

Carrots and onions are also good choices, as they deter soil pests and don't compete for the same nutrients. Spinach can be planted as a ground cover to help retain moisture and suppress weeds early in the season. Avoid planting fennel, kohlrabi, or brassicas (like cabbage and broccoli) near your peppers, as they can inhibit growth or attract pests.