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.
Perennial, from Europe. Neat, ground-hugging, foot-wide mat of blue-gray foliage. Stems 6–10 in. high bear small, typically pink to rose, single blossoms (less than an inch across) that are very fragrant. Bloom season lasts from spring to fall if plants are deadheaded regularly. Effective as a groundcover or edging or in a rock garden.
Native to South America. Upright, open habit, 2–3 ft. tall and 1 ft. wide. Stems and narrowly ob...
Native to Texas. Grows to 6–18 in. high and 10–12 in. wide, with erect, leafy stems more o...
Native to Eurasia and North Africa. Slender, branching, hairy-stemmed plant to 3 ft. tall and 1 ft. wi...