The Dawes Arboretum

Common name: Royal Knight™ Japanese spirea

Family: Rosaceae (rose family)

Synonym: Spiraea × bumalda 'KLMtwenty'

Distribution: Species native to e. Asia

Hardiness: USDA Zone 4

Life form: Deciduous shrub/Subshrub

Comments: The compact, mound-like habit and consistent burgundy fall foliage color makes this 3' high and 4' wide deciduous shrub a good candidate for the foundation planting or small garden area. Rich purplish pink blooms are produced in large clusters in late spring or early summer. A good heavy pruning first thing in spring every few years encourages fresh growth. Plant in full sun in moist, well-drained soil.