How to Grow Black Jack Pepper
Wikimedia Commons
Black Jack Pepper
Capsicum annuum 'Black Jack'
vegetableBlack Jack is a ornamental pepper variety that produces dark, glossy black fruits that ripen to red when mature. These peppers are both decorative and edible, with a moderately hot flavor profile and are popular for container gardening. The plant is compact and prolific, making it suitable for both indoor and outdoor growing.
When should you plant Black Jack Pepper in your zone?
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Example Black Jack Pepper timeline · Pittsburgh, PA (Zone 6b)
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Plant Black Jack Pepper
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 Black Jack Pepper
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Black Jack Pepper dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9-11; can be grown as an annual in cooler zones or indoors
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Seedling
2-3 weeksSmall green leaves emerge; plant is delicate with thin stem
Maintain warm soil (70-85°F), provide bright light or grow lights, keep soil moist, use fan for air circulation
Vegetative
3-4 weeksPlant grows bushy with multiple stems and dark green foliage; no flowers yet
Provide full sun, water regularly, fertilize every 2 weeks with balanced fertilizer, pinch tops to encourage branching
Flowering
2-3 weeksSmall white flowers appear at branch tips; buds form along stems
Ensure consistent moisture and warmth (65-80°F), switch to higher phosphorus fertilizer, maintain pollinator access or hand-pollinate indoors
Fruiting
3-5 weeks for black stageSmall green peppers develop and darken to glossy black as they mature; plant heavily laden with fruits
Continue watering deeply, support heavy branches with stakes if needed, reduce nitrogen fertilizer, maintain consistent care
Ripening/Harvest Ready
Ongoing through seasonPeppers are firm, glossy black (or transitioning to red); plant continues producing new flowers
Harvest black peppers for ornamental/culinary use, allow some to remain for red ripening if desired, continue feeding and watering
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity, spray with water, use neem oil or insecticidal soap; isolate severely infested plants
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Spray with strong water stream, apply neem oil or insecticidal soap, introduce ladybugs
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Use yellow sticky traps, spray with neem oil or insecticidal soap, ensure good air circulation
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Remove affected leaves, spray with neem oil, use blue sticky traps, maintain proper humidity
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Remove infested peppers, use insecticidal sprays, practice crop rotation, remove plant debris
Uses
Hot Pepper Cooking
CulinaryBlack Jack peppers deliver moderate heat (30,000-50,000 Scoville units) suitable for salsas, stir-fries, hot sauces, and spicy dishes. They retain their color when dried, making them attractive for seasoning blends and garnishes. [source]
Ornamental Container Plant
HouseholdThe striking black fruits against green foliage make Black Jack a highly decorative houseplant or patio specimen. Perfect for windowsills, patios, and indoor kitchen gardens where both beauty and functionality are desired. [source]
Dried Pepper Arrangements
CraftBlack Jack peppers can be dried while maintaining their color and used in floral arrangements, wreaths, and decorative dried herb bundles. They add exotic texture and visual interest to home décor. [source]
Capsaicin Health Benefits
MedicinalLike other hot peppers, Black Jack contains capsaicin, a compound studied for anti-inflammatory and pain-relieving properties. Fresh or dried peppers can be used in teas or topical preparations for natural wellness applications. [source]
Pollinator Attraction
WildlifeThe flowers attract bees and other pollinators, supporting garden biodiversity. Growing Black Jack peppers contributes to pollinator-friendly garden ecosystems. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Pick peppers when they reach full glossy black color for ornamental display and firm texture; if desired, leave peppers on plant to ripen to red (takes additional 2-3 weeks). Use sharp pruners to avoid damaging branches. Harvest regularly to encourage continued fruit production. Peppers can be used fresh when black or allowed to fully ripen to red for sweeter flavor.
Fun Facts
- 🌱 Black Jack peppers are technically unripe—the black color develops before full maturity, and if left on the plant longer, they will eventually turn bright red with increased sweetness and vitamin C content.
- 🌱 This variety is particularly popular in indoor gardening and can thrive in containers as small as 5-gallon pots, making it ideal for apartment dwellers and windowsill gardeners.
- 🌱 The name 'Black Jack' references the striking contrast of the dark black peppers against the bright green foliage, creating a dramatic visual effect that has made it increasingly popular in ornamental gardening over the past two decades.
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