Sophistica petunias combine beautiful flowers in special unique colors with professional seed quality. Suitable for pots, combination planters and baskets, these premium petunias can command a higher price point at retail than standard varieties. Sophistica Blackberry and Sophistica Lime Green are the newest additions to the series.
Use a well-drained, disease-free, soilless medium with a pH of 5.5 to 6.2 and a medium initial nutrient charge. Maintain temperatures at 57 to 65° F nights and 61 to 75° F days. Sophistica petunias can tolerate temperatures as low as 35° F; however, keep in mind that crop timing is related to daily average temperature when grown under proper daylength. Blackberry may get some yellow color breaks under cold temperatures at about 35° F.
Apply nitrate-form with low-phosphorus fertilizer at 175- to 225-ppm nitrogen every other irrigation. Apply a balanced ammonium and nitrate-form fertilizer with low phosphorus as needed to encourage growth and balance medium pH. Maintain medium pH at 5.8 to 6.2 and EC at 1.2 to 1.5. For a constant fertilizer program, apply fertilizer at 100- to 175-ppm nitrogen while maintaining the above recommended EC and pH.