Buddleia davidii 'Royal Red'
Buddleja davidii, commonly called butterfly bush, is a deciduous shrub that is native to thickets on mountain slopes, limestone outcrops, forest clearings and rocky stream banks in China. It typically grows to 6-12’ (less frequently to 15’) tall with a spread to 4-15’ wide when not killed back by cold winter temperatures. It is noted for its bushy habit, arching stems, showy/fragrant flowers and vigorous growth. It has escaped gardens and naturalized in the eastern U.S. plus Washington, Oregon, California and Hawaii. It has been declared a noxious weed in Oregon and Washington. Aggressive spreading has been observed in a number of eastern states including Pennsylvania, New Jersey, West Virginia, Kentucky and North Carolina. Spike-like terminal and axillary flower clusters bloom from early to late summer, sometimes to first frost. Flowers are densely clustered in showy cone-shaped panicles from 6-18” long. In the wild, straight species flowers are lilac to purple with orange-yellow throats. Numerous named cultivars have been introduced over the years, expanding the range of flower colors to include pinks, yellows, whites and reds. Flowers (each to ½” long) are mildly fragrant, and, as the common name suggests, very attractive to butterflies. Flowers are also very attractive to hummingbirds and bees. Flowers give way to two-valved seed capsules that split open when ripe (about 50 seeds per capsule). Finely toothed, elliptic to lanceolate leaves (6-10” long) taper to long points. Leaves are sage green above and white tomentose beneath.Genus name honors the Reverend Adam Buddle (1660-1715), English botanist and vicar of Farmbridge in Essex. The genus name is frequently listed today as Buddleia. However, Linnaeus named the genus Buddleja (pronounced with a silent “j”) which is still considered to be the proper spelling (first name survives) according to the International Code of Botanical Nomenclature.Specific epithet honors Pere Armand David (1826-1900), French missionary and naturalist, who found this species growing in China in 1869/1870 along the border of China and Tibet.Common name refers to the plant being very attractive to butterflies.'Royal Red' features spike-like 6-14" long terminal clusters of magenta-purple flowers which bloom from June to September and sometimes to first frost. Flowers are fragrant. A Royal Horticultural Society of Great Britain Award of Garden Merit plant.