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How to Grow Petunia

Petunia Germination Information

Petunia is the botanical name for Petunia
Petunia Seed Germination How to Sow Petunia:
  • Best sown indoors at a temperature of 70-75°
  • Sow 10-12 weeks before last frost and expect germination in 10 days
  • In order for seeds of double-flowered or F1 hybrids to germinate, they will need a temperature of 80°
  • In either case, sow with NO cover as light aids in germination
  • Petunia seeds are some of the only seeds that can be germinated in full sun
  • It is not recommended to sow seeds outdoors

How to Grow Petunia:
Transplanting: Transplant when there are at least two sets of true leaves

Spacing: Plant out after danger of frost is past at 12 inches apart in full sun and a rich, light, sandy soil with excellent drainage

Soil: Feed monthly with a balanced fertilizer. The single-flowered forms will tolerate alkaline and poor soils

Temperature: For best results, grow on under full sun at 65-75° days/62-68° nights, however plants are tolerant of higher and lower temperatures

Additional Care:  To keep plant growth in check, pinch plants back when 6 inches tall and again after the first flush of flowers. For conservatory culture: site in full sun, maintain 50° nights, and allow the soil to become dry between waterings

Appearance and Use:

Used in containers, hanging baskets, bedding, borders, and greenhouses. They are vigorous plants growing 10-18 inches tall and spreading to 3 feet. From summer to frost they are covered in slightly fragrant, funnel-shaped, double or single flowers that are bicolor or solid colors of violet, blue, red, pink, salmon, or white


About Petunia:
Pronunciation:  pe-tun’ya hi’brid-å
Lifecycle:  Annual
Origination: Solanaceae; of hybrid origin
Common Name: Petunia