Common Name: butterfly bush
Type: Deciduous shrub
Family: Scrophulariaceae
Zone: 5 to 9
Height: 3.00 to 7.00 feet
Spread: 3.00 to 5.00 feet
Bloom Time: June to September
Bloom Description: Purple with orange throats
Sun: Full sun
Water: Medium
Maintenance: Low
Flower: Showy, Fragrant, Good Cut
Attracts: Hummingbirds, Butterflies
Tolerate: Rabbit, Clay Soil
Culture
Easily grown in average, medium moisture, well-drained soils in full sun. Becomes weedy and sparse with diminished flowering performance if not grown in full sun. Does poorly in wet, poorly draining conditions. Will adapt to clay soil if properly amended. In USDA Zones 5 and 6, this plant will often die to the ground in winter and therefore is often grown as a herbaceous perennial. Even if plants do not die to the ground in winter, they usually grow more vigorously, produce superior flowers and maintain a better shape if cut close to the ground in late winter each year. Removal of spent flower spikes during the growing season may encourage additional bloom.
Noteworthy Characteristics
Buddleja is a genus of about 100 species of mainly shrubs but also some trees and climbers. They are native to Asia, Africa and North and South America. Commonly called butterfly bush, they are very attractive to butterflies and other pollinators.
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.
Common name refers to its attractiveness to butterflies.
'Asian Moon' is a triploid hybrid butterfly bush which will not spread in the landscape by self-seeding because it is sterile. It typically grows in a rounded form to 3-7’ tall. Purple flowers with orange throats bloom from June to September (sometimes to first frost) in upright spike-like terminal and axillary clusters (each to 4-6” long). Flowers are fragrant, and, as the common name suggests, very attractive to butterflies. Willowy, elliptic, medium green leaves (to 6" long) with serrate margins are slightly glossy. 'Asian Moon' is the result of a cross between Buddleja davidii var. nonhoensis 'Moonshadow' (tetraploid female parent) and Buddleja asiatica (diploid male parent). Introduced by the University of Arkansas.
Problems
No serious insect or disease problems. Nematodes can be troublesome in the southern United States. Rabbits tend to avoid this plant. This plant can spread readily by seed and is considered invasive in New Zealand, the United Kingdom, and certain parts of the United States and Canada. Check local laws and invasive plant resources before adding this plant to your landscape.
Uses
Provides attractive summer to early fall flowers when few other shrubs are in bloom. Grow in borders, cottage gardens, rose gardens or butterfly gardens. Popular fresh cut flower.