How to Grow Kew Red
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Kew Red
Capsicum annuum var. longum
vegetableKew Red is a distinctive long chili pepper variety known for its slender, elongated pods that mature from green to a deep red color. Originally developed at the Royal Botanic Gardens, Kew, this pepper offers moderate heat and a complex flavor profile suitable for both fresh use and cooking. The plants are compact yet productive, making them ideal for gardeners seeking an ornamental as well as functional pepper variety.
When should you plant Kew Red in your zone?
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Example Kew Red timeline · Pittsburgh, PA (Zone 6b)
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Plant Kew 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 Kew Red
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Kew Red dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 6-10; can be grown in cooler zones with season extension techniques
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Seedling
2-3 weeksTiny seedlings with first true leaves emerging; plant appears delicate with cotyledons fading
Maintain consistent warmth (70-80°F). Provide bright light 14-16 hours daily. Keep soil moist but not waterlogged. No fertilizer yet.
Vegetative
4-6 weeksPlant develops multiple branches and leaves; robust growth with no flowers yet; stems become woody and stronger
Begin light fertilizing every 2 weeks with balanced NPK (14-14-14). Ensure full sun exposure. Pinch top when 6 inches tall to encourage branching.
Flowering
2-3 weeksSmall white flowers appear at leaf axils along branches; plant may set many flower buds
Maintain consistent watering. Switch to higher phosphorus fertilizer (5-10-10) to support flowering. Ensure good air circulation. Avoid over-nitrogen which reduces flowers.
Fruiting
3-4 weeksGreen peppers develop and elongate; pods grow to 3-4 inches long with slender, pointed shape characteristic of Kew Red
Continue consistent watering and fruiting fertilizer. Support heavy fruit with stakes if needed. Reduce nitrogen. Mulch to regulate soil temperature and moisture.
Maturation to Red
2-3 weeksPeppers mature from green to vibrant deep red; final size and heat development; full color transition indicates peak ripeness
Allow peppers to remain on plant for full red color development (2-3 weeks from green). Reduce watering slightly to concentrate sugars. Protect from heavy rain or wind.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water; use insecticidal soap or neem oil; introduce ladybugs; reflective mulch
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Increase humidity; mist plants regularly; spray neem oil; isolate heavily infested plants
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Yellow sticky traps; insecticidal soap; neem oil; reflective mulch; avoid excess nitrogen
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Row covers on young plants; diatomaceous earth; spinosad spray; neem oil
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Remove infested fruit immediately; use pheromone traps; spinosad spray; practice crop rotation
Uses
Fresh Use and Cooking
CulinaryKew Red peppers are excellent for fresh salads, salsas, and stir-fries. Their slender shape makes them suitable for stuffing or roasting whole. The moderate heat (5,000-30,000 Scoville units) provides flavor without overwhelming heat. [source]
Pepper Flakes and Dried Goods
CulinaryMature red Kew Red peppers dry exceptionally well for creating homemade pepper flakes or chili powder. The thin-walled structure allows for quick drying. [source]
Capsaicin and Health Benefits
MedicinalRed peppers contain capsaicin, a compound studied for anti-inflammatory and pain-relief properties. They are also rich in vitamin C and antioxidants. [source]
Ornamental Garden Feature
HouseholdKew Red's compact growth habit (12-18 inches tall) and progression from green to red peppers makes it highly ornamental. Suitable for container gardening on patios and balconies. [source]
Seed Saving
CraftKew Red is a stable open-pollinated variety ideal for seed saving. Ripe red peppers can be harvested, fermented, dried, and their seeds saved for future seasons. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest at green stage for milder flavor (after 70 days), or wait 2-3 additional weeks for full red maturity with deeper, spicier flavor. Use pruning shears or sharp knife to cut peppers; do not pull. Regular harvesting encourages continuous production. Each plant produces 20-40+ peppers per season.
Fun Facts
- 🌱 Kew Red was developed at the Royal Botanic Gardens in Kew, London, and was selected specifically for its ornamental qualities combined with culinary value.
- 🌱 Chili peppers are technically berries botanically, and a single Kew Red plant can produce over 40 peppers in a season if grown in optimal conditions.
- 🌱 The heat level of Kew Red peppers increases as they mature and turn red; green peppers from the same plant are noticeably milder than their red counterparts.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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