How to Grow Petunia Supertunia Royal Velvet
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Petunia Supertunia Royal Velvet
Petunia × hybrida 'Supertunia Royal Velvet'
flowerSupertunia Royal Velvet is a vigorous, mounding petunia cultivar known for its deep purple-violet flowers with velvety texture. This hybrid petunia produces abundant blooms throughout the growing season and is bred for disease resistance and continuous flowering. It's an excellent choice for containers, hanging baskets, and garden beds.
When should you plant Petunia Supertunia Royal Velvet in your zone?
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Example Petunia Supertunia Royal Velvet timeline · Pittsburgh, PA (Zone 6b)
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Plant Petunia Supertunia Royal Velvet
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 Petunia Supertunia Royal Velvet blooms
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Petunia Supertunia Royal Velvet dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives as annual in zones 2-11; perennial in zones 9-11
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Seedling
2-3 weeksTiny seedlings with first true leaves appearing 1-2 weeks after germination. Fragile with very small oval leaves.
Keep soil moist but not waterlogged. Provide bright light and maintain 70-75°F. Thin seedlings if overcrowded. Handle gently.
Vegetative Growth
3-4 weeksPlant develops bushy foliage with many branch points. Leaves become larger and more numerous, creating a mounding shape.
Pinch growing tips when plant reaches 4-6 inches to encourage branching. Feed with balanced fertilizer every 2 weeks. Ensure adequate light (14-16 hours ideal for seedlings).
Budding
1-2 weeksFlower buds form along branch tips. Plant may look slightly stressed as it redirects energy from vegetative to reproductive growth.
Begin gradual hardening off if grown indoors. Switch to fertilizer slightly higher in phosphorus and potassium. Water consistently.
Flowering
8-12 weeks (until frost or temperature decline)Abundant deep purple-violet flowers open continuously. Each flower lasts several days; new buds continually develop. Mounding habit becomes prominent.
Deadhead spent flowers to encourage continuous blooming. Fertilize every 7-10 days with diluted liquid fertilizer. Monitor for pests. Enjoy the prolific blooms.
Decline/End of Season
Variable based on climateAs temperatures cool or frost approaches, flowering slows. Plant may become leggy or less vigorous.
Can pinch back and cut back by one-third in mid-summer to reinvigorate (will reflower in 3-4 weeks). Remove plant after frost in cold climates or maintain as houseplant if in warm zones.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with neem oil or insecticidal soap; use yellow sticky traps; encourage natural predators
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Increase humidity; spray with water jet; apply neem oil; use miticide if severe
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Spray with water; apply insecticidal soap or neem oil; use beneficial insects like ladybugs
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Hand-pick caterpillars; apply Bacillus thuringiensis (Bt); use spinosad
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Improve air circulation; remove affected flowers; avoid overhead watering; apply fungicide if needed
Uses
Container and Hanging Basket Displays
HouseholdSupertunia Royal Velvet's cascading, mounding habit makes it perfect for containers, hanging baskets, patio pots, and window boxes. Its vigorous growth fills spaces quickly and maintains a full appearance all season. [source]
Garden Bed and Border Color
HouseholdDeep purple-violet flowers create striking color accents in landscape beds, borders, and mass plantings. The velvety flower texture adds visual interest and pairs well with silver-foliaged plants or contrasting bright colors. [source]
Cut Flowers for Arrangements
CraftFresh petunia blooms can be cut for indoor floral arrangements and bouquets. They typically last 3-5 days in a vase with fresh water and flower food. [source]
Pollinator Attraction
WildlifePetunia flowers attract butterflies, bees, and hummingbirds, making them valuable for pollinator gardens and supporting local insect populations throughout the growing season. [source]
Disease-Resistant Ornamental Breeding
HouseholdThe Supertunia line was specifically bred for improved disease resistance and vigor compared to traditional petunias, making it more reliable and lower-maintenance for home gardeners. [source]
Harvest Tips
Petunias are ornamental flowers, not harvested for food. Deadhead (remove spent flowers) regularly to promote continuous blooming throughout the season. Cut flower stems for indoor arrangements in early morning when fully hydrated.
Fun Facts
- 🌱 Supertunia is a patented hybrid developed specifically for superior garden performance, disease resistance, and continuous blooming compared to standard petunia cultivars.
- 🌱 The 'Royal Velvet' name refers to the deep, rich purple color and the velvety texture of the flower petals, which have a soft, plush appearance and feel.
- 🌱 Petunias belong to the Solanaceae family alongside tomatoes and peppers; they're native to South America and were first cultivated by the Guaraní people.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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