How to Grow Kong Red
Wikimedia Commons
Kong Red
Capsicum annuum
vegetableKong Red is a large, blocky sweet bell pepper variety known for its impressive size, thick walls, and vibrant red color at maturity. This cultivar produces high yields of premium-quality peppers ideal for fresh eating, cooking, and commercial production. The plants are vigorous and productive, making them popular among both home gardeners and commercial growers.
When should you plant Kong Red in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Kong Red timeline · Pittsburgh, PA (Zone 6b)
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Plant Kong Red
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Kong Red
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Kong Red dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-10; can be grown as annual in cooler zones or as tender perennial in zone 11
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Seedling
3-4 weeksTender seedlings with 2-4 true leaves, fragile and pale green
Maintain warm temperatures (70-80°F), high humidity, and bright light. Use grow lights if needed. Keep soil consistently moist but not waterlogged. Avoid cold drafts.
Vegetative
3-4 weeks after transplantingSturdy plants with multiple branches, dark green foliage, no flowers yet. Transplants establish roots and develop strong stems.
Harden off seedlings before transplanting outdoors. Plant after all frost danger passes and soil reaches 60°F (ideally 70°F+). Apply balanced fertilizer every 2-3 weeks. Mulch around plants.
Flowering
2-4 weeksPlants produce small white flowers with yellow centers clustered at branch tips; buds and blooms develop simultaneously
Ensure consistent watering and warm temperatures (65-80°F nights ideal). Reduce nitrogen slightly to encourage fruit set; shift to higher phosphorus and potassium. Remove first flower clusters if desired for stronger plants. Ensure good air circulation.
Fruiting
4-6 weeks to mature greenSmall green peppers develop at flower sites, growing larger and thicker-walled. Peppers remain green initially, then gradually change color.
Maintain consistent deep watering—critical for large fruit development. Continue fertilizing every 2-3 weeks with balanced formula. Support heavy fruit branches with stakes or cages. Prune lower foliage for air circulation. Watch for pests and diseases.
Harvest Maturity
2-4 weeks from mature green to full red colorPeppers reach full size (typically 4+ inches long, 3-4 inches wide), walls thicken, and color changes from green to bright red
Continue regular watering and fertilizing. Harvest green peppers for cooking or allow to fully ripen to red for sweetness. Later harvests may require shade cloth in extreme heat. Maintain mulch to regulate soil temperature.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil; encourage beneficial insects like ladybugs; use reflective mulches
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Increase humidity with regular misting; spray with water; use neem oil or miticide; ensure good air circulation
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Use yellow sticky traps; spray with neem oil or insecticidal soap; encourage natural predators
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Remove infested fruit immediately; use row covers during early growth; apply spinosad or neem oil
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Use cardboard collars around transplants; apply diatomaceous earth; remove leaf litter; use Bt (Bacillus thuringiensis)
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Ensure good air circulation; avoid overhead watering; use disease-resistant varieties; remove affected leaves; apply copper fungicide
Uses
Fresh eating and cooking
CulinaryKong Red peppers are excellent fresh in salads, as crudités, or grilled whole. They can also be roasted, stuffed, sautéed, or used in stir-fries. The thick walls make them ideal for roasting and peeling. [source]
Preservation
CulinaryTheir thick flesh makes Kong Red ideal for freezing, roasting and freezing, or pickling. They can also be dried or made into pepper paste for long-term storage. [source]
Nutritional and health benefits
MedicinalRed peppers are rich in vitamin C (especially when fully ripe), vitamin A, antioxidants, and lycopene. They support immune function and eye health. [source]
Seed saving
HouseholdKong Red peppers produce viable seeds easily. Allow fully ripe peppers to remain on the plant or harvest and store in a cool, dry place, then extract and dry seeds for next season. [source]
Ornamental appeal
WildlifeThe large red peppers create striking visual interest in the garden, attracting butterflies and hummingbirds while providing excellent garden color. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Kong Red peppers can be harvested at the mature green stage (when full-sized but still green) for cooking, or left on the plant 2-4 additional weeks to fully ripen to brilliant red for sweetness and vitamin C content. Use a sharp knife or pruners to cut peppers from the plant rather than pulling. Regular harvesting encourages continued production. Peak harvest typically occurs in mid-to-late summer.
Fun Facts
- 🌱 Kong Red peppers are among the largest sweet bell pepper varieties, with some fruits reaching 5+ inches in length and weighing 6+ ounces each.
- 🌱 The color change from green to red occurs because carotenoids (including lycopene and beta-carotene) accumulate as chlorophyll breaks down, making red peppers significantly sweeter and more nutritious than green ones.
- 🌱 Peppers are technically berries botanically, and a single well-maintained Kong Red plant can produce 15-30+ large peppers over a season in optimal conditions.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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