Sweet Peppers in Zone 9B — Florida

Sweet peppers are a fantastic addition to any Florida garden. Their sweet flavor and crisp texture make them incredibly versatile in the kitchen, adding a burst of sunshine to everything from salads to stir-fries. Plus, growing your own is deeply satisfying, especially when you can harvest fresh peppers even as the weather starts to cool down!

Our Florida gardening calendar is different, and sweet peppers can present some challenges with our humidity and summer heat. However, by starting early indoors and timing your transplant just right, you can enjoy a bountiful harvest before the worst of the summer heat hits. With our long, 344-day growing season, you'll have plenty of opportunity to get it right!

Here in Florida, we get a jump start on sweet peppers by starting seeds indoors. Aim to sow your seeds early to late December, about eight weeks before you plan to transplant them outside. This gives the seedlings a head start before our reversed "spring" arrives.

Use seed trays or small pots filled with a good seed-starting mix. Keep the soil consistently moist, but not soggy. Bottom watering is a great technique – set the tray in a shallow container of water and let the soil absorb the moisture from below. Place the trays in a warm spot, around 70-75°F, and provide plenty of light, either from a sunny window or a grow light.

Transplant your sweet pepper seedlings outdoors early February through early March, once the danger of frost has passed. Before transplanting, harden off the seedlings by gradually exposing them to outdoor conditions for about a week. Start with an hour or two of indirect sunlight and increase the time each day.

Space your plants 18-24 inches apart in well-draining soil. Keep in mind that even though it's February, Florida weather can still be unpredictable, so be prepared to cover your seedlings if a cold snap threatens.

Consistent watering is key to growing sweet, thick-walled peppers here in Florida. The goal is to maintain even soil moisture, especially as the fruits develop. The "finger test" is your best friend: stick your finger about two inches deep into the soil. If it feels dry, it's time to water.

During our drier spring months, aim to give your pepper plants about 1-2 inches of water per week, either through rainfall or irrigation. In the wet summer, you may not need to water as often, but keep an eye on the soil moisture. 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. A good layer of mulch, like pine straw or wood chips, will help retain moisture and suppress weeds, which is especially helpful with our sandy Florida soil.

While not always necessary, some sweet pepper varieties can get quite large, especially when loaded with fruit. Staking provides the support they need to prevent branches from breaking, especially after a heavy rain. This is particularly important in our hurricane-prone region.

Install stakes at planting time, placing them a few inches away from the main stem. As the plant grows, gently tie the stems to the stakes with soft twine or plant ties. This will help keep the plant upright and prevent the fruit from touching the ground.

Pruning sweet peppers is pretty straightforward. When the plant is young, pinch off the first few flowers that appear. This encourages the plant to focus its energy on vegetative growth, resulting in a stronger, more productive plant later on.

Throughout the season, remove any yellowing or dead leaves. As we approach the end of the season, with our first frost around late December, you can remove any new flowers that form. This will encourage the plant to put its remaining energy into ripening the existing peppers.

You can expect your first sweet pepper harvest early April through late May, about 65 days after transplanting. The best indicator of ripeness is the color of the pepper. Harvest when the pepper has reached its full size and the color is uniform and vibrant. Sweet peppers actually get sweeter the longer they ripen on the plant, so don't be afraid to wait until they're fully colored.

To harvest, use sharp pruning shears or a knife to cut the pepper from the plant, leaving a short stem attached. Regular harvesting encourages the plant to produce more peppers.

As our first frost approaches in late December, harvest any remaining peppers, even if they haven't fully ripened. Green peppers will ripen indoors if you place them in a paper bag with an apple or banana.

Here are some common problems you might encounter with sweet peppers in Florida:

• Blossom Drop
• What it looks like: Flowers fall off without setting fruit. Small fruit yellows and drops.
• What causes it: Temperature stress, common in Florida. 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 insects (green, black, or white) on stems and leaf undersides. Sticky honeydew residue.
• What causes it: Rapid-reproducing sap-sucking insects that thrive in warm Florida weather.
• How to fix/prevent it: Strong water spray knocks them off. Encourage ladybugs and lacewings. Insecticidal soap for heavy infestations. Neem oil works systemically. Avoid excess nitrogen fertilizer.
• Sunscald
• What it looks like: White, papery patches on fruit exposed to direct sun.
• What causes it: Intense, direct sunlight on fruit, often after leaf loss. Common after pruning or disease.
• How to fix/prevent it: Don't over-prune foliage. Use shade cloth in extreme heat. Maintain healthy foliage to shade fruit naturally.
• Blossom End Rot
• What it looks like: Sunken, dark brown or black leathery patch on the bottom of the fruit.
• What causes it: Calcium deficiency caused by inconsistent watering. In Florida, this is often due to our sandy soil and alternating periods of drought and heavy rainfall.
• How to fix/prevent it: Water consistently. Mulch heavily to maintain even soil moisture. Don't over-fertilize with nitrogen. Remove affected fruit.

Florida Specific Challenges: The combination of high heat, very-high humidity, and wet-summer rainfall creates a perfect environment for fungal diseases and pests. Choose disease-resistant varieties and practice good air circulation to minimize these problems. Our sandy soil means consistent watering and fertilization are crucial.

Companion planting can be a great way to improve the health and productivity of your sweet peppers. Tomatoes are excellent companions because they share similar growing requirements and can provide shade for peppers during the hottest part of the day. Basil is another good choice, as it repels many common pepper pests. Carrots and onions are also beneficial, as they help to deter nematodes in the soil. Spinach can act as a ground cover, helping to retain moisture and suppress weeds.

Avoid planting fennel, kohlrabi, or brassicas (like cabbage and broccoli) near your peppers. Fennel inhibits the growth of many plants, while kohlrabi and brassicas compete for nutrients and can attract pests that also affect peppers.