A few dozen species of branching, sticky annuals and perennials from South America make up the genus Petunia. They are some of the most commonly grown bedding and container plants. Showy, 5-lobed flowers bloom over a long period from late spring to fall. There are many cultivars available, falling into two groups, grandiflora and multiflora. Grow in beds, borders, containers, and hanging baskets.
Noteworthy CharacteristicsTolerates poor soil and coastal conditions.
CarePlant in a sheltered site with full sun and light, well-drained soil. Deadhead regularly.
PropagationThree months before the last frost, start seeds indoors at 55° to 64°F. Or take softwood cuttings in spring or summer.
ProblemsAphids, caterpillars, leaf miners, gray mold, bacterial soft rot, leaf spots, cucumber mosaic virus, impatiens necrotic spot virus.