Genus: Valerian

Centranthus

Photo/Illustration: 
Michelle Gervais
Valerian (Centranthus)
sen-TRAN-thus
Valerianaceae
This genus comprised of a dozen or so species of annuals and perennials features red or white, funnel-shaped, starry flowers on upright, branched stems. Only C. ruber is commonly grown in gardens. It has fragrant red, pink, or white flowers in late spring to late summer. Centranthus self-seeds freely and has naturalized in some parts of the U.S.
Noteworthy characteristics:  Self-sows. Long blooming. Attracts bees and butterflies.
Care:  Valerian prefers alkaline soil. Choose a site in full sun with well-drained soil of moderate fertility. Be sure to deadhead regularly.
Propagation: 

Sow seed in a cold frame in spring. Perennial species may be carefully divided in early spring.

Problems: 

Generally trouble-free.

Species, varieties and clutivars for genus Centranthus

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Red valerian
Centranthus ruber