How to Grow Diamond Head
Wikimedia Commons
Diamond Head
Capsicum annuum var. acuminatum
vegetableDiamond Head is a compact ornamental and edible pepper variety with small, upright fruits that ripen from green to bright red. The plant produces abundant peppers in a decorative mounded form, making it suitable for both container and garden growing. The peppers are mild to moderately hot and can be used fresh or dried.
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Example Diamond Head timeline · Pittsburgh, PA (Zone 6b)
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Plant Diamond Head
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 Diamond Head
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Diamond Head dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-10; grown as annual in colder zones
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Seedling
2-3 weeksTiny sprouted seedlings with cotyledons (seed leaves), developing first true leaves
Maintain warm, moist conditions (70-80°F). Provide bright light once emerged. Thin to strongest seedlings if needed.
Vegetative
4-6 weeksYoung transplants establishing roots and developing branching structure, forming compact mounded form characteristic of Diamond Head
Harden off seedlings gradually before transplanting outdoors. Plant after last frost date. Keep soil moist and provide consistent nutrients. Mulch around base.
Flowering
Ongoing, 4-12 weeks into growing seasonPlant produces small white or pale purple flowers in the leaf axils; flowers appear abundantly throughout the growing season
Maintain consistent watering and warmth (above 60°F at night). Avoid excessive nitrogen which promotes leafy growth over flowers. Pollination typically occurs via insects.
Fruiting
6-10 weeks from flower to harvest-ready fruitSmall upright peppers develop where flowers were, initially green, gradually enlarging and changing color (typically to red at full maturity)
Continue regular watering and feeding with balanced or slightly phosphorus-rich fertilizer. Support heavy fruit loads if needed. Provide consistent warmth (65-85°F optimal).
Harvest
Ongoing until frostPeppers reach full size and vibrant color; plant continues producing new flowers and fruit throughout the season until frost
Harvest peppers at green stage for milder flavor or wait for full color change. Cut peppers with knife or pruners rather than pulling. Continued harvesting encourages more production.
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. Strong water spray can dislodge populations.
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Increase humidity and spray with water; use neem oil or miticide if severe. Remove heavily infested leaves.
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Remove and destroy affected fruit. Use pheromone traps. In severe cases, insecticidal treatments may be necessary.
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Use yellow sticky traps; spray with insecticidal soap or neem oil. Reflective mulches can deter them.
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Remove affected leaves; use insecticidal soap or spinosad. Blue or yellow sticky traps can monitor populations.
Uses
Fresh eating and cooking
CulinaryDiamond Head peppers are mild to moderately hot and can be eaten fresh, roasted, or dried. They are small and ornamental, making them attractive for fresh pepper dishes or as a colorful garnish. [source]
Container and landscape decoration
OrnamentalThe compact, mounded growth habit and abundant colorful peppers make Diamond Head excellent for decorative containers, raised beds, and garden displays. Plants are attractive throughout the season. [source]
Drying and spice production
CulinarySmall peppers dry readily on the plant or after harvest, and can be ground into powder or used whole in dried pepper blends for cooking. [source]
Bird food and wildlife value
WildlifeBirds are attracted to the colorful peppers and will feed on them in fall and winter. The flowers also attract pollinators and beneficial insects. [source]
Decorative dried arrangements
HouseholdMature peppers can be dried on the stem for use in decorative wreaths, arrangements, and craft projects, adding natural color and texture to home décor. [source]
Harvest Tips
Harvest peppers when they reach desired size and color. Green peppers can be picked anytime after reaching full size; allow longer on plant for full color development (typically 60-90 days from transplant for first red peppers). Use a knife or pruners to cut peppers cleanly rather than pulling. Continued harvesting encourages the plant to produce more peppers. In frost-prone regions, pick all remaining peppers before the first frost.
Fun Facts
- 🌱 Diamond Head peppers are named for their distinctive diamond-like shape and bright appearance when clustered on the compact plant.
- 🌱 The plant can continue producing fruit indoors under grow lights through winter, making it a long-lived houseplant in addition to an annual garden vegetable.
- 🌱 All parts of the mature plant (peppers, leaves, stems) are edible, though the peppers are the primary harvested portion for culinary use.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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