Petunia, a popular garden flower. The funnel-shaped blossoms, 2 to 41/2 inches (511 cm) across, are white or a shade of blue, red, or purple, and may be marked with bars or stripes. Some varieties of petunias have double flowers; others have flowers with ruffled or fringed edges.
The petunia plant is hairy and sticky, with a weak stem and variably shaped leaves. The erect garden variety is 8 to 18 inches (2046 cm) tall; dwarf varieties, 4 to 6 inches (1015 cm). Balcony petunias, used for window boxes, are sprawling varieties.Petunias have funnel-shaped blossoms that are white or a shade of blue, red, or purple.
Petunia plants usually are started from seed each year. In moderate climates they may be started outdoors, but they will bloom earlier if started indoors. They bloom until the first frost.
The petunia is native to Argentina. Its name comes from petun, a South American Indian name for tobacco (a related plant).
The common petunia is Petunia hybrida of the nightshade family, Solanaceae.