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. Different cultivars have been developed within the different classes. For example, the Daddy series includes Blue Daddy with blue flowers, Orchid Daddy with plum-purple flowers and Pink Daddy with soft pink flowers. Grandiflora petunias have large flowers from 3 to 5 inches across. Many cultivars, with some of the showiest flowers, belong to this class.