Germination lighting: Light required
Germination days: 7 - 12 days
Grow on temperature day: 65 - 75 degrees fahrenheit
Grow on temperature night: 60 - 65 degrees fahrenheit
Weeks indoor: 11 - 13 weeks
Plant spread: 10 - 12 inches
Plant height: 10-15"
Petunias grow best in full sun, although they ll tolerate dappled shade, especially in hot conditions. They need well-draining, slightly moist soil. In soggy soils, they become leggy. Regular deadheading also improves their appearance. An early and midsummer application of high-phosphorus fertilizer improves both blooms and vigor.