Pair of White Double Petunia blooms on a white background.
A White Double Petunia with some leaves on a white background.
An arrangement of White Double Petunias on a light blue background with foliage.
A couple of White Double Petunias in a glass vase with some leaves on a white background.
Several White Double Petunias in a white vase on a light blue background.
A couple of White Double Petunias on a white background.
Pair of White Double Petunia blooms on a white background.
A White Double Petunia with some leaves on a white background.
An arrangement of White Double Petunias on a light blue background with foliage.
A couple of White Double Petunias in a glass vase with some leaves on a white background.
Several White Double Petunias in a white vase on a light blue background.
A couple of White Double Petunias on a white background.

Petunia Seeds,
White Double

51 ReviewSKU: #FL1032Min. seed count: 75
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Description

(Petunia hybrida). Graceful and pristine, White Double is the epitome of garden elegance. Large, ruffled double blooms in pure white create a striking display that shines in the sun, bringing a touch of sophistication to your garden. Its vigorous, mounded habit makes it an ideal choice for containers, baskets, and garden beds, where it will continue to bloom with minimal care. Bred by the Černý family over five generations, White Double represents their commitment to quality and beauty, making it a favorite for gardeners seeking both elegance and reliability.

Growing Tips: Thrives in well-draining, fertile soil with a pH between 6.0 and 7.0. It needs full sun for the best flowering. Regular deadheading (removing spent flowers) encourages continuous blooming, and pinching back young plants results in bushier growth. Petunias are typically grown as annuals, but they can be perennial in frost-free climates.

Plant Details

Botanical Name
Petunia hybrida
Life Cycle
Annual
Sun Requirement
6–8 hr.
Days to Germinate
7–14
Days to Maturity
70–85
Planting Depth
Surface sow
Plant Spacing
10–12 in.
Ideal Temperature
75–80°F
Frost Hardy
No

When to Grow

Start petunia seeds indoors 8-10 weeks before the last expected frost to get an early bloom. Transplant seedlings outdoors only once all danger of frost has passed and nighttime temperatures remain above 50 F. In warmer regions, petunias can also be directly sown into the garden in early spring or fall. Learn about your area’s hardiness zones and first/last frost dates in our blog post ‘Our Experts Answer Questions, Share Resources.’

How to Sow and Plant

Sow seeds on the surface of moist soil—they require light to germinate, so do not cover them with soil. Maintain a temperature of 70-85 F for best germination, which usually takes 7-14 days. Keep the soil consistently moist but not waterlogged. Once seedlings have developed 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 blooms.

How to Grow

Water petunias about once a week and avoid overwatering to prevent root rot. Fertilize with a balanced liquid fertilizer every 2-3 weeks to encourage more flowers. If plants become leggy, trim them back by one-third to encourage fresh growth. In extremely hot climates, petunias may slow blooming, but providing light afternoon shade can help reduce heat stress. Removing spent flowers and occasional light pruning will keep the plant looking full.

How to Save Seeds

  • Petunias will readily self-seed in mild winter climates.
  • To save seed, hand-pick the brown seed pods.
  • Take care to collect the seed pods before they burst and spread the seeds across the garden.
  • Store the seeds over winter in a cool, dark, dry place.

FAQ

Questions?

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