Bear
clusters of
small, tubular,
five-petaled
flowers, usually
in summer. Most
are fast-growing
ground covers,
good in parking
strips, along
driveways, on
dry banks; also
attractive in
wall crevices,
hanging baskets.
Best in hot
weather. Need
good air
circulation (to
avoid mildew)
and well-drained
soil, especially
in winter. Many
treated as
annuals.
Many-branched plant 6–12 in. high, 1/2 –3 ft. wide. Oblong, 2– 4-in., bright green or gray-green leaves with toothed margins. Flowers in flat, compact clusters to 3 in. wide. Colors include white, pink, red, purple, blue, and combinations. Often treated as an annual.