This genus is made up of more than 300 species and an extremely large number of hybrids. Most kinds form attractive evergreen mats or tufts of grasslike green, gray-green, blue-green, or gray-blue leaves. Single, semidouble, or double flowers come in white and shades of pink, rose, red, yellow, and orange. Many have a rich, spicy fragrance. The main bloom period for most is spring into early summer, but some kinds rebloom later in the season or keep going into fall if faded flowers are removed.
Among dianthus are favorites such as cottage pink and sweet William, highly prized cut flowers such as carnation (clove pink), and rock garden miniatures. There are hundreds of varieties and hybrids available, including some local favorites.
All kinds of dianthus thrive in light, fast-draining soil. Carnations, sweet William, and cottage pinks need fairly rich soil. Rock garden or alpine types require a gritty growing medium, with added lime if soil is acid. Avoid overwatering. Sow seeds of annual kinds in flats or directly in the garden. Propagate perennial kinds by cuttings made from tips of growing shoots, by division or layering, or from seed. Carnation and sweet William are subject to rust and fusarium wilt.
From Europe and Asia. Grows to 8–12 in. high, forming a loose mat to 1 ft. wide. Blossoms, about 3/4 in. wide with sharp-toothed petals, are borne at ends of forked flowering stems with short leaves. Colors include white and light or dark rose to purple, spotted with lighter colors. Blooms in summer, in just a few weeks from seed; sometimes again in fall. Useful, showy ground- or bank cover. Can tolerate half-day shade.
Petunias have long been among the most popular annuals, thanks to their profuse bloom, incredible colo...
From North Africa. Grows to 1 1/2–2 1/2 ft. tall and 6–12 in.wide, with narrow gray-green ...
Native to Texas. Grows to 6–18 in. high and 10–12 in. wide, with erect, leafy stems more o...