How to Grow Suprema Pepper
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Suprema Pepper
Capsicum annuum 'Suprema'
vegetableSuprema is a large-fruited bell pepper variety known for its blocky, thick-walled peppers and robust plant vigor. It produces abundant yields of sweet, crisp peppers that transition from green to red at maturity. This cultivar is popular in both home and commercial gardens for its reliability and superior fruit quality.
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Example Suprema Pepper timeline · Pittsburgh, PA (Zone 6b)
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Plant Suprema 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 Suprema Pepper
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Suprema Pepper dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-11 as a summer annual; in cooler zones 2-4, grow as an annual in containers or greenhouse
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Get my Suprema Pepper timeline →Growth Stages
Seedling
4-6 weeksSmall plants with 2-4 true leaves, typically 2-4 inches tall
Provide 14-16 hours of grow light daily, maintain 70-80°F soil temperature, keep soil moist but not soggy, avoid overwatering to prevent damping-off
Vegetative Growth
2-4 weeks after transplantingRobust plant development with multiple stems and abundant foliage, 6-12 inches tall at transplant stage
Harden off seedlings before transplanting outdoors; plant after last frost when soil reaches 60°F; provide support stakes or cages early; pinch first flowers to encourage branching
Flowering
3-6 weeksSmall white or pale yellow flowers appear in leaf axils; plant becomes bushy and full
Maintain consistent watering and fertilization; once flowering begins, shift to lower nitrogen fertilizer; ensure good air circulation; flowers may drop if temperatures exceed 90°F or drop below 55°F
Fruiting
4-6 weeks for green peppersPeppers develop from flowers, initially green and blocky, gradually enlarging to full size (3-4 inches)
Continue regular watering and feeding with balanced fertilizer or calcium-rich formula (bone meal); support heavy fruits with stakes or cages; remove any damaged or misshapen peppers to redirect energy
Maturity & Ripening
2-3 weeks for color changePeppers transition from deep green to bright red; glossy finish and maximum sweetness develop
Allow peppers to remain on plant for red ripening if desired (requires 2-3 additional weeks); harvest green for firmer peppers or allow full color change; cut peppers with scissors to avoid damaging plant
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil; introduce ladybugs or lacewings
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Increase humidity; spray undersides of leaves with water or neem oil; use miticides if severe
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Remove infested peppers immediately; use row covers early in season; apply spinosad or pyrethrin sprays
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Use yellow sticky traps; spray with insecticidal soap or neem oil; encourage natural predators
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Maintain consistent watering; add lime or gypsum to soil; mulch to regulate moisture
Uses
Fresh and Cooked Dishes
CulinarySuprema peppers are versatile in the kitchen, suitable for raw use in salads and slaws, stuffing and roasting, sautéing with other vegetables, or adding to stir-fries and fajitas. The thick walls and lower seed content make them ideal for removing seeds and using as vessels for fillings. [source]
Preservation & Storage
CulinaryThese peppers can be frozen whole or chopped, roasted and preserved in oil, pickled, or dried. They store well in the refrigerator for 1-2 weeks when kept in a plastic bag, and dried peppers retain flavor for months. [source]
Vitamin C & Antioxidant Content
MedicinalSuprema peppers are rich in vitamin C, especially when red-ripe, supporting immune function and wound healing. They also contain capsaicin and quercetin, antioxidants that may reduce inflammation and support cardiovascular health. [source]
Seed Saving
HouseholdPeppers are self-compatible and relatively easy to save seeds from. Allow fully ripe fruit to stay on the plant, harvest when skin is soft, extract seeds, and dry thoroughly before storage. Suprema seeds will breed relatively true to type. [source]
Pollinator & Bird Attraction
WildlifePepper flowers attract bees, butterflies, and other beneficial pollinators essential for fruit production. Ripened peppers may also attract birds later in the season, adding garden wildlife value. [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 green peppers when firm and full-sized (3-4 inches long) by cutting with a sharp knife or pruners. For red, fully ripe peppers, wait 2-3 additional weeks after green stage; these will be sweeter. Continue harvesting throughout the season to encourage more fruit production. Peppers can also be harvested slightly immature and ripened indoors at room temperature.
Fun Facts
- 🌱 Suprema peppers are technically berries, not vegetables, as they develop from the flower's ovary and contain seeds.
- 🌱 Red peppers contain 3 times more vitamin C than green peppers because the fruit has more time to synthesize nutrients as it ripens.
- 🌱 Pepper plants can live for several years in frost-free climates and may continue producing for 2-3+ seasons if properly maintained and pruned.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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