FlowerPetunia
Supercascade Series Petunia
Supercascade Series petunias are hybrid annuals that deliver the largest single blooms available in petunia breeding, with flower heads reaching 4 to 5 inches across on compact 12 to 15 inch plants. These fragrant growers mature in 100 to 109 days and thrive in full sun across hardiness zones 7 through 11, making them surprisingly versatile for both ground-level displays and container arrangements. The combination of enormous, delicate blooms on tidy plants creates a generous visual impact without sprawl, whether you're tucking them into seasonal baskets, anchoring a mixed border, or creating a fragrant ground cover in a sunny spot.
Photo © True Leaf Market
Growing Conditions
USDA Zone
7-11
Sunlight
Full Sun
Water
Moderate
Soil
Well-drained Loam, Fertile
Growth Stats
15 in
Height
TypeUpright
Spacing
14
Plant Profile
Sunlight
Full Sun
Water
Moderate
Zones
7-11
Size
15in H x ?in W
Growth
—
Care
Moderate
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Highlights
The defining feature of Supercascade is the sheer scale of its flowers relative to plant size: blooms that would look oversized on taller varieties sit gorgeously proportioned on these neat 12 to 15 inch mounds. Each flower unfolds to 4 to 5 inches with a delicate quality that reads as feminine and refined in any setting. The fragrance adds an unexpected sensory dimension, transforming simple baskets and borders into aromatic retreats. As a hybrid, these seeds are carefully crossed to ensure vigorous, reliable performers that flower prolifically from summer through frost.
Common Uses
Supercascade petunias earn their place in seasonal containers, window boxes, and hanging baskets where their generous blooms and fragrance can be appreciated up close. Their compact upright habit and tidy proportions make them equally effective as ground cover in garden beds, where they deliver continuous color without requiring constant maintenance. They're also valued for cutting and arrangement work, where the oversized single blooms add fresh fragrance and visual weight to bouquets and seasonal displays.
Growing Timeline
No timeline data available yet for this variety.
Care Instructions
Start Indoors
Start seeds indoors 6 to 8 weeks before your last spring frost. Petunia seeds need light to germinate, so press them gently onto moist seed-starting mix without covering them. Keep soil temperature around 70 to 75 degrees Fahrenheit and maintain consistent moisture. Seedlings will emerge in 7 to 10 days under bright light. Thin or transplant into individual containers once they develop their first true leaves.
Transplant Outdoors
Transplant hardened-off seedlings outdoors after all danger of frost has passed and soil has warmed. Space plants 14 inches apart in full sun. Bury them at the same depth they were growing in containers. Water gently after transplanting and keep soil evenly moist for the first week to establish roots.
Pruning
Deadhead spent flowers regularly to encourage continuous blooming and maintain a tidy appearance. Pinch back stem tips on young transplants before planting if they're becoming leggy, which will promote branching and fuller plants. Once established in the garden, Supercascade's compact upright habit generally requires minimal intervention beyond routine deadheading.
Growing Calendar
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Companion Planting
Pests & Diseases
Ecology & Traits
Scientific Classification
Petunia x hybrida
Family
Solanaceae
Genus
Petunia
Growth Habit
Upright