How to Grow Petunia 'Double Rose'
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Petunia 'Double Rose'
Petunia × hybrida 'Double Rose'
flowerPetunia 'Double Rose' is a stunning flowering annual with fully double, ruffled blooms in shades of pink and rose. These compact plants produce abundant flowers throughout the growing season and are ideal for borders, containers, and garden beds. The doubled petals create a lush, peony-like appearance that attracts attention in any garden setting.
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Example Petunia 'Double Rose' timeline · Pittsburgh, PA (Zone 6b)
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Plant Petunia 'Double Rose'
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 'Double Rose' blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Petunia 'Double Rose' dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-11 as an annual; return from seed in warmer zones
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Seedling
10-14 daysTiny seedlings with first true leaves appearing; very delicate and susceptible to damping off
Maintain high humidity and warm temperatures (70-75°F). Provide bright light without direct intense sun. Keep soil evenly moist. Thin seedlings to prevent crowding.
Vegetative Growth
3-4 weeksYoung plants developing multiple stems and leaves; compact bushy structure forming
Gradually acclimate seedlings to outdoor conditions. Pinch growing tips when plants reach 3-4 inches tall to encourage bushiness. Maintain consistent moisture and feed with balanced fertilizer every 2-3 weeks.
Budding
2-3 weeksFlower buds beginning to form at leaf axils and stem tips; plant becoming fuller
Continue pinching for larger, fuller plants if buds haven't formed yet. Switch to higher phosphorus fertilizer to encourage flowering. Maintain regular watering schedule.
Flowering
8-12 weeks or until frostDouble rose-pink flowers opening profusely; continuous bloom throughout season
Deadhead spent flowers regularly to encourage continuous blooming. Water consistently, increasing frequency during hot weather. Feed every 2 weeks with bloom-boosting fertilizer. Monitor for pests and diseases.
Decline
Variable with climateFlowering slows as temperatures cool or heat becomes extreme; plant becomes leggy
Cut back plants by half in mid-summer to rejuvenate for fall blooms. In warm climates, provide afternoon shade. Remove plants after frost in cold climates; can be overwintered indoors in zones 9-11.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil weekly. Remove heavily infested leaves. Encourage beneficial insects like ladybugs.
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Increase humidity and air circulation. Spray foliage with water to dislodge mites. Use miticide or neem oil if infestation is severe.
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Spray with strong water stream to remove. Use insecticidal soap or horticultural oil. Plant near companion plants that attract natural predators.
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Hand-pick visible caterpillars. Apply Bacillus thuringiensis (Bt) spray. Remove affected foliage.
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Improve air circulation and reduce overhead watering. Remove infected plant material. Apply fungicide if severe; avoid dense planting.
Uses
Container & Bedding Displays
HouseholdPetunia 'Double Rose' is superb for hanging baskets, window boxes, patio containers, and garden borders, providing dramatic color from early summer through fall. The double blooms create an especially full, ornamental appearance. [source]
Cut Flower Arrangements
CraftThe showy double flowers make excellent additions to fresh flower bouquets and arrangements, lasting several days in water. Cut in early morning when stems are hydrated for longest vase life. [source]
Pollinator Garden Support
WildlifeThough the double blooms limit nectar access compared to single varieties, petunias still attract bees, hummingbirds, and butterflies. They provide summer-long color in pollinator gardens. [source]
Color Massing & Garden Design
HouseholdThe consistent rose-pink color allows gardeners to create striking color-coordinated displays and themed garden schemes. Perfect for creating focal points or softening hardscapes. [source]
Seasonal Festival Planting
HouseholdWidely available at garden centers in spring and summer, 'Double Rose' is popular for seasonal plantings during holidays, events, and celebration periods. [source]
Harvest Tips
Petunias are ornamental flowers not harvested for production, but deadheading (removing spent blooms) extends flowering. Cut flowers for arrangements when blooms are fully open. Pinch off fading flowers regularly throughout the season to prevent seed formation and encourage new blooms.
Fun Facts
- 🌱 Petunias are members of the Solanaceae family, making them relatives of tomatoes, potatoes, and peppers, though they produce no edible fruit.
- 🌱 The double-flowered varieties like 'Double Rose' cannot be reliably grown from seed as doubles—they're propagated by cuttings to maintain the doubled petal trait, making them more expensive than single-flowered types.
- 🌱 Petunias are sensitive to ethylene gas (found in ripening fruit and decomposing plant material), which can cause buds to drop—keep them away from fruit bowls and dying plant debris.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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