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Petunia Seeds, Superbissima Cosmic Cherry
Description
(Petunia superbissima). Truly one of the most whimsical flowers we have ever seen! The flower heads have ruffled edges and reach a whopping 7 inches across, in a mix of magenta to violet colors. This variety from Černý Seed Company in the Czech Republic is a favorite in the Baker Creek trial garden… and the kitchen! This edible flower has a delicious flavor that can be used in baking and homemade beverages. We enjoyed making doughnuts using these petunias to impart a fascinating floral note. Add this fantastic mix to pots, beds, borders, and children’s gardens for a touch of magic.
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70-85 days to maturity
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6-8 hours of full sun
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Sprouts in 7-14 days
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Seed Depth: Surface Sow
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Plant Spacing: 10-12"
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Ideal Temperature: 75-80 F
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Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Superbissima Cosmic Cherry petunia thrives in well-draining, fertile soil with a pH between 6.0 and 7.0. It needs full sun for maximum flowering, though it can tolerate partial shade. Deadhead spent flowers to encourage continued blooming.
When to Grow
Start petunia seeds indoors 8-10 weeks before the last expected frost. Transplant seedlings outdoors once all danger of frost has passed and temperatures stay above 50 F. In warmer climates, petunias can also be directly sown into the garden in early spring or fall. If you’re unsure of your last frost date, consult our blog post ‘Our Experts Answer Questions, Share Resources.’
How to Sow and Plant
Surface sow the seeds, as they require light to germinate. Keep the soil evenly moist and maintain a temperature of 70-85 F during germination. Once seedlings develop several true leaves, transplant them into larger containers or directly into the garden, spacing them 10-12 inches apart to give room for their large, ruffled blooms.
How to Grow
Water petunias about once a week, but avoid overwatering to prevent root rot. A balanced liquid fertilizer every 2-3 weeks will encourage continuous flowering. If plants become leggy, trim them back by one-third to promote new growth. In extreme heat, blooming may slow down, but providing light afternoon shade can help reduce stress. Pinching young shoots makes for a more compact growth habit.
How to Save
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Petunias will readily self-seed in mild winter climates.
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To save seed, hand-pick the brown seed pods.
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Take care to collect the seed pods before they burst and spread the seeds across the garden.
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Store the seeds over winter in a cool, dark, dry place.
FAQ
How large do the flowers of the Superbissima Cosmic Cherry petunia get?
This variety produces giant, ruffled flowers that can reach 5 inches or more in diameter.
Do Superbissima Cosmic Cherry petunias attract pollinators?
Yes, petunias attract bees, butterflies, and hummingbirds, making them a great addition to pollinator-friendly gardens.
How long do Superbissima Cosmic Cherry petunias bloom?
With proper care, petunias bloom continuously from late spring until the first frost.
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