Several species of perennials and subshrubs in this genus are grown for their 5-petaled blue flowers that bloom from late summer to fall and for their reddish fall color. They are native to dry, open habitats in Africa, the Himalayas, China, and southeast Asia. Grow in a border or rock garden, or as groundcover.
Noteworthy CharacteristicsGood autumn color. Pretty 5-petaled flowers that resemble Phlox .
CareGrow in full sun and moderately fertile, light, moist but well-drained soil.
PropagationStart new plants from softwood cuttings in spring or semi-ripe cuttings in summer. Remove suckers in fall or spring, or layer in autumn.
ProblemsGenerally trouble-free, but powdery mildew can sometimes cause problems.