Genus: Plumbago

Ceratostigma

Photo/Illustration: 
Michelle Gervais
Plumbago (Ceratostigma)
sir-at-oh-STIG-mah
Plumbaginaceae
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 characteristics:  Good autumn color. Pretty 5-petaled flowers that resemble Phlox .
Care:  Grow in full sun and moderately fertile, light, moist but well-drained soil.
Propagation: 

Start new plants from softwood cuttings in spring or semi-ripe cuttings in summer. Remove suckers in fall or spring, or layer in autumn.

Problems: 

Generally trouble-free, but powdery mildew can sometimes cause problems.

Species, varieties and clutivars for genus Ceratostigma

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Ceratostigma plumbaginoides