How to Grow Grenadin Scarlet
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Grenadin Scarlet
Dianthus chinensis 'Grenadin Scarlet'
flowerGrenadin Scarlet is a vibrant, double-flowered variety of Chinese pink with densely petaled scarlet-red blooms. This compact annual produces abundant flowers throughout the growing season and is prized for cut flowers, borders, and containers. It's a reliable, heat-tolerant variety that blooms continuously from summer until frost.
When should you plant Grenadin Scarlet in your zone?
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Example Grenadin Scarlet timeline · Pittsburgh, PA (Zone 6b)
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Plant Grenadin Scarlet
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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First Grenadin Scarlet blooms
Around Jun 6≈ 50 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Grenadin Scarlet dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-10; grown as annual in most regions
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Seed germination & seedling
2-3 weeksTiny seedlings with narrow cotyledons emerge 7-14 days after sowing. First true leaves appear within 1-2 weeks.
Maintain consistent moisture and temperature around 65-70°F. Provide bright, indirect light. Thin seedlings to proper spacing once they have 2-3 true leaves.
Vegetative growth
3-4 weeksCompact, bushy plant develops dense, narrow, blue-green foliage. Height reaches 12-18 inches with multiple branching stems.
Fertilize every 2-3 weeks with balanced fertilizer. Pinch back shoot tips early to encourage bushier growth. Water regularly but allow slight drying between waterings.
Bud formation & flowering
2-3 weeks until first flowersDense double flower buds form at stem terminals. Scarlet-red petals open fully, creating pompom-like blooms 1-1.5 inches across.
Continue regular fertilizing to support continuous blooming. Deadhead spent flowers regularly to encourage more blooms. Ensure good air circulation to prevent fungal issues.
Peak bloom & continuous flowering
6-8 weeks or until frostPlant is covered with scarlet double flowers. Blooms are produced continuously throughout summer and fall until frost.
Deadhead spent flowers weekly. Water consistently during hot periods. Continue fertilizing monthly. Monitor for pests and diseases.
Decline & end of season
Until frostFlowering slows as temperatures drop and days shorten in fall. Plant stops flowering after first frost (32°F).
Stop fertilizing. Reduce watering. Pull plants when frost kills them. Collect seed if desired before final frost.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity, spray with water, use insecticidal soap or neem oil if severe. Avoid over-fertilizing with nitrogen.
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Spray with strong water stream, use insecticidal soap, or introduce beneficial insects like ladybugs.
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Remove debris and hiding spots, use slug bait or beer traps, hand-pick in early morning.
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Ensure excellent drainage, avoid overwatering, provide good air circulation, remove and discard infected plants.
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Improve air circulation, avoid wetting foliage, apply sulfur dust or fungicide if needed.
Uses
Edible flower garnish
CulinaryThe petals of Dianthus flowers are edible and add a peppery, clove-like flavor to salads, desserts, and beverages. They provide visual appeal and subtle spice to gourmet dishes. [source]
Cut flowers and floral arrangements
CraftGrenadin Scarlet is prized for its long vase life and vibrant scarlet double blooms, making it ideal for fresh bouquets, wedding arrangements, and floral design. The prolific flowering ensures continuous supply throughout the season. [source]
Traditional herbal use
MedicinalHistorically, Dianthus species have been used in traditional Chinese and European herbalism to support circulation and reduce inflammation. Modern research supports antioxidant properties in the plant. [source]
Garden border and container ornamental
HouseholdIts compact, bushy growth habit and continuous scarlet blooms make it perfect for formal borders, containers, window boxes, and mass plantings for instant color impact. [source]
Pollinator attraction
WildlifeThe abundant, long-blooming flowers attract butterflies, bees, and other pollinators, supporting local populations throughout the growing season. [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 flowers in early morning when fully open and crisp. Cut stems above a leaf node to encourage new buds. Grenadin Scarlet is excellent for cut flowers and can last 7-10 days in water. Deadheading spent flowers extends blooming period significantly.
Fun Facts
- 🌱 Grenadin Scarlet is part of the Dianthus genus, often called 'pinks,' which derive their common name from the fringed petal edges that appear to be cut with pinking shears, not from their color.
- 🌱 Double-flowered varieties like Grenadin Scarlet were highly prized by Victorian gardeners and were featured prominently in period cutting gardens and floral arrangements.
- 🌱 Dianthus flowers release their strongest fragrance in the early morning and evening, with the scent carrying notes of clove, cinnamon, and carnation—making them beloved by perfumers and gardeners alike.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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