How to Grow Surfinia Scarlet
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Surfinia Scarlet
Petunia × hybrida 'Surfinia Scarlet'
flowerSurfinia Scarlet is a trailing petunia cultivar known for its vibrant scarlet-red flowers and cascading growth habit. It's a hybrid petunia specifically bred for container gardening and hanging baskets, producing abundant blooms throughout the growing season. This variety is prized for its vigor, weather tolerance, and continuous flowering performance.
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Example Surfinia Scarlet timeline · Pittsburgh, PA (Zone 6b)
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Plant Surfinia 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 Surfinia Scarlet blooms
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Surfinia Scarlet dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-10; grown as an annual in cooler zones, perennial in zone 9+
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Seedling
2-3 weeksTiny seedlings with 2-4 small leaves emerge in 7-10 days; very delicate appearance
Keep soil moist but not soggy; provide bright light (grow lights help); maintain 70-75°F temperature; avoid damping off by ensuring good air circulation
Vegetative Growth
3-4 weeksPlant develops multiple stems and increasingly dense foliage; starts trailing and cascading habit; no flowers yet
Pinch growing tips when 4-6 inches tall to encourage branching; continue regular watering; apply balanced fertilizer every 2 weeks; ensure 6-8 hours of sunlight daily
Budding & Early Flowering
2-3 weeksSmall buds appear at branch tips; first scarlet flowers begin opening; plant becomes fuller and more prostrate
Switch to lower nitrogen, higher phosphorus fertilizer (bloom formula); maintain consistent moisture; deadhead spent flowers to encourage more blooms; stake or hang basket appropriately
Peak Blooming
8-12 weeks or until frostAbundant scarlet flowers cover the plant in profusion; trailing stems extend 18-36 inches; continuous flowering occurs
Deadhead regularly for continuous blooms; water daily in heat; feed weekly with diluted bloom fertilizer; monitor for pests and diseases; provide afternoon shade in extreme heat (90°F+)
Decline (Late Season)
Until first frostFlowering slows as temperatures cool; plant growth slows; foliage may become less vigorous
Reduce fertilizing; cut back watering slightly; frost will kill the plant in zones below 9; can be brought indoors as houseplants in mild climates or grown as annuals
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with neem oil or insecticidal soap every 7-10 days; remove heavily infested leaves; introduce yellow sticky traps; improve air circulation
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Increase humidity by misting foliage; spray with water to dislodge; use neem oil or miticide if severe; ensure good air circulation
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Spray with strong water stream; apply insecticidal soap or neem oil; introduce beneficial insects like ladybugs; check undersides of leaves regularly
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Use blue sticky traps; spray with neem oil or insecticidal soap; remove damaged flowers; maintain good air circulation
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and
Avoid overwatering; use well-draining soil; yellow sticky traps for gnats; neem oil applications for mites
Uses
Container & Hanging Basket Displays
CraftSurfinia Scarlet is specifically bred for cascading containers and hanging baskets, creating dramatic trailing displays of bright red flowers. Its vigorous growth and dense flowering make it ideal for creating full, abundant basket arrangements. [source]
Landscape Color & Garden Design
HouseholdUsed extensively in borders, containers, window boxes, and mixed annual plantings to add vibrant scarlet color from spring through first frost. The trailing habit makes it excellent for softening edges and creating vertical interest. [source]
Pollinator Attraction
WildlifeThe abundant flowers attract hummingbirds, butterflies, and bees throughout the growing season. The continuous blooming provides sustained nectar source for pollinators. [source]
Edible Flower Garnish
CulinaryWhile not commonly used, petunia flowers are technically edible with a slightly spicy, peppery flavor and can be used as ornamental garnishes on desserts and salads. Ensure no pesticides have been applied if using for consumption. [source]
Traditional Plant Medicine
MedicinalSome petunia species have been used in traditional herbal medicine for their mild diuretic and laxative properties, though modern medicinal use is limited. Historical use suggests potential antimicrobial compounds. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Surfinia Scarlet is an ornamental flower, not harvested for food. Deadhead spent blooms by pinching off faded flowers just below the flower head to encourage continuous blooming throughout the season. Cut flowers can be used in fresh arrangements; pick in early morning when fully opened.
Fun Facts
- 🌱 Surfinia is a registered trademark of Japanese plant breeder Suntory, making it one of the most commercially successful petunia breeding lines worldwide. The breeding program specifically targeted the trailing growth habit and weather tolerance that makes this variety so popular.
- 🌱 Despite being bred as an ornamental, petunias are actually perennials in zones 9-10; Surfinia Scarlet can survive winter in mild climates and regrow in spring, though annual growth typically produces the best flowering.
- 🌱 The scarlet color in Surfinia petunias comes from anthocyanin pigments, the same compounds responsible for red coloration in blueberries and pomegranates, giving the flowers remarkable color saturation and vibrancy.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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