Bell Peppers in Zone 3B — Great Plains

Bell peppers are a worthwhile addition to any Great Plains garden. Their sweet flavor and crisp texture shine in summer dishes, and they're surprisingly productive even with our variable weather. Plus, there's nothing quite like the taste of a homegrown pepper warmed by the intense Plains sunshine.

Growing bell peppers in our region definitely has its challenges. We face extreme temperature swings, hail risk, and a relatively short 118-day growing season. But with careful timing and a few simple strategies, you can harvest a satisfying crop of peppers before the first frost.

Starting bell pepper seeds indoors is essential in the Great Plains to get a jump on our short growing season. Aim to start your seeds in early to late April, about eight weeks before you plan to transplant them outside. This gives them plenty of time to develop into strong seedlings.

You'll need seed trays, a good seed-starting mix, and a warm, bright location. A heat mat can help speed up germination. Once the seedlings emerge, make sure they have plenty of light. A grow light is ideal, especially with our variable spring weather. Bottom watering is a great way to keep the soil moist without damping off.

Keep a close eye on the weather forecast. Those early spring warm spells can be deceiving. It's best to wait until all danger of frost has passed before even thinking about transplanting.

Transplanting bell peppers outdoors in the Great Plains should happen in early to late June. This is usually after the risk of frost has passed, but keep an eye on the long-range forecast. Before you plant, harden off your seedlings by gradually exposing them to outdoor conditions for about a week.

Choose a sunny spot with well-drained soil. Space your pepper plants 18-24 inches apart to give them room to grow. Consider adding some compost to the planting hole to give them a boost. Water them well after transplanting.

Be prepared for sudden temperature drops or hail. Row covers can provide some protection against both. A little extra care during transplanting can make a big difference in the long run.

Consistent watering is crucial for bell peppers in the Great Plains, especially during our hot summers. Peppers need moderate moisture to develop thick-walled, flavorful fruit. Drought stress can lead to thin walls and blossom drop, which nobody wants.

During the peak of summer, when temperatures are often in the 90s, you may need to water your peppers every few days. Use the "finger test" – stick your finger about two inches into the soil. If it feels dry, it's time to water. Aim for about 1-2 inches of water per week, either from rain or irrigation. Water deeply at the base of the plant to encourage strong root growth.

Overhead watering can increase the risk of fungal diseases, especially if you live in an area with higher humidity. If you do water overhead, do it in the morning so the foliage has time to dry before nightfall. Watch for signs of underwatering (wilting leaves) or overwatering (yellowing leaves). Mulching around your pepper plants with straw or wood chips helps retain moisture and regulate soil temperature, which is especially important in our variable climate.

Remember, our rainfall can be unpredictable. Some years we get plenty, others we're in a drought. Stay vigilant and adjust your watering schedule as needed.

Supporting your bell pepper plants is a good idea in the Great Plains, especially as they start producing heavy fruit. The weight of the peppers can cause branches to break or the entire plant to topple over, especially in our windy conditions.

A simple stake works well for supporting bell peppers. Drive the stake into the ground near the plant at planting time, being careful not to damage the roots. As the plant grows, gently tie the main stem to the stake with soft twine or plant ties.

Wind protection is essential in our region. Planting your peppers in a sheltered location or using windbreaks can help prevent damage. You can also use a tomato cage for additional support and protection.

Pruning bell peppers can help improve airflow and encourage fruit production. Pinch off any early flowers that appear before the plant is well-established. This directs the plant's energy into growing strong roots and foliage.

Throughout the season, remove any fruit that is touching the ground to prevent rot. You can also prune out some of the interior branches to improve airflow and reduce the risk of disease.

As the end of the season approaches (around mid- September), you can pinch off any new flowers to encourage the plant to ripen the existing fruit before the first frost.

In the Great Plains, you can expect your first bell pepper harvest in mid August through mid September. Bell peppers can be harvested at any stage of maturity, but they are sweetest when fully ripe. Green peppers are immature, while red, yellow, or orange peppers are fully ripe.

Look for peppers that are firm, smooth, and have a glossy skin. To harvest, use pruners or a sharp knife to cut the pepper from the plant, leaving a short stem attached. Avoid pulling the pepper off, as this can damage the plant.

Regular harvesting encourages continued production. Check your plants every few days and harvest any ripe peppers. As the first frost approaches (mid- September), harvest all remaining peppers, even the green ones. Green peppers can be ripened indoors by placing them in a paper bag with an apple or banana.

Bell peppers in the Great Plains can face several common problems:

Blossom End Rot

• What it looks like: Sunken, dark brown or black leathery patch on the bottom of the fruit. Often affects the first fruits of the season.
• What causes it: Calcium deficiency caused by inconsistent watering. Our variable rainfall – drought followed by heavy rain – makes it hard for plants to take up calcium.
• 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: Temperature stress. Peppers don't set fruit well when nights stay above 75°F or days exceed 95°F. This is common during our hot Plains summers.
• How to fix/prevent it: Be patient – fruit set resumes when temperatures moderate. Provide afternoon shade during extreme heat. Keep plants well-watered.

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.
• How to fix/prevent it: Strong water spray knocks them off. Encourage ladybugs and lacewings. Insecticidal soap for heavy infestations.

Sunscald

• What it looks like: White, papery patches on fruit exposed to direct sun.
• What causes it: Intense, direct sunlight on fruit. This is common in the Plains, especially after leaves are lost to wind or hail.
• How to fix/prevent it: Don't over-prune foliage. Use shade cloth in extreme heat.

Great Plains Specific Challenges: The hot heat and low-to-moderate humidity of the Great Plains can exacerbate problems like blossom drop and sunscald. Variable rainfall can lead to blossom end rot. Wind can damage plants and spread pests. Vigilance and proactive measures are key to success.

Companion planting can be a helpful strategy for growing bell peppers in the Great Plains.

Good companions include:

• Tomatoes: They enjoy similar growing conditions and can provide some shade for peppers during the hottest part of the day.
• Basil: It repels pests like aphids and whiteflies.
• Carrots and Onions: They deter soil-borne pests.
• Spinach: It provides ground cover and helps retain moisture in our dry climate.

Avoid planting bell peppers near:

• Fennel: It inhibits the growth of many plants.
• Kohlrabi: It competes for nutrients and space.
• Brassicas (cabbage, broccoli, cauliflower): They attract similar pests.