Some petunia cultivars need to be pinched back as they grow to keep them blooming throughout the summer. Other cultivars are carefree and do not require pinching. Numerous flower characteristics of the petunia provide the consumer with many choices. Single and double flower types are available. Single flowers are broad, funnel-shaped.
Double flowers look like carnations.
The size of the flower ranges from 5 inches to 1 inch across, depending on the cultivar. The petal edges may be frilled, fluffed, fluted or straight. Flower colors include red, bright pink, light pink, purple, burgundy, magenta, plum, lavender, blue, coral, salmon, white, yellow, and bicolored, to name a few. Some flowers have a white fringe around the outside edge of the petal. Also, a star pattern is made on flowers with white radiating out from the center of the flower, which separates a solid color into five sections.