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TREES & Plants

Butterfly Bush

A long-blooming shrub with dense clusters of fragrant flowers, butterfly bush attracts butterflies and hummingbirds. Often considered a sub-shrub because it dies back to the ground. A great addition to sunny borders and dry open gardens.

Botanical name: 
Buddleja davidii (syn Buddleia davidii)
All Common Names: 
Butterfly bush, Summer lilac
Family (English): 
Figwort
Family (Botanic): 
Scrophulariaceae
Tree or Plant Type: 
  • Perennial
  • Shrub
Foliage: 
  • Deciduous (foliage falls off)
Native Locale: 
  • Non-native
Hardiness Zones: 
  • Zone 5
  • Zone 6
  • Zone 7
  • Zone 8
  • Zone 9
Growth Rate: 
  • Fast
Light Exposure: 
  • Full sun (6 hrs direct light daily)
Tolerances: 
  • Dry sites
  • Alkaline soil
Soil Preference: 
  • Moist, well-drained soil
Flower Color & Fragrance: 
  • Fragrant
  • Blue
  • Pink
  • Purple
  • White
Size Range: 
  • Large shrub (more than 8 feet)
  • Medium shrub (5-8 feet)
Shape or Form: 
  • Arching
  • Spreading
  • Upright
Landscape Uses: 
  • Specimen
  • Massing
  • Foundation
  • Mixed border
  • Patio/sidewalk
Time of Year: 
  • Mid summer
  • Late summer
More Information: 

Size

6 to 8 feet high and 5 to 8 feet wide

Tree & Plant Care

A butterfly magnet with long season of blooms. Late to leaf out in spring.
Best in well-drained, humus rich soil, Thrives in full sun.
Will die back to ground in winter, prune in early spring to promote vigorous new growth and flowering.
Regular dead-heading will promote new blooms.

Disease, pests and problems

Mites

Disease, pest, and problem resistance

Tolerant of heat, humidity, drought, and poor soils as long as they are well-drained.

Native geographic location and habitat

Native to China.

Attracts birds & butterflies

This plant is a nectar source, attracting the monarch, buckeye, black swallowtail, pipevine swallowtail, snout butterfly, great spangled fritillary, pear crescent, red admiral, painted lady, common checkered-skipper, and nymphalid butterflies.

Leaf or needle arrangement, size, shape, and texture

Simple, opposite leaves; lance-shaped, 4 to 6 inches long
Blue-green to silver-gray; no real fall color

Flower arrangement, shape, and size

Small flowers in long, upright terminal clusters.
Flowers on new wood.
Color varies with cultivar from white, pink, purple to deep blue.

Fruit, cone, nut, and seed descriptions

Two-valved brown capsule; not ornamentally important.

Cultivars and their differences 

Black Knight (Buddleja davidii 'Black Knight'):  Dark purple flowers in terminal spikes in June through September.

Blue Chip (Buddleia 'Blue Chip'):  2 to 3 feet high and wide;  small, compact miniature with continuous bluish-purple flowers, excellent for containers.  Part of the Lo & Behold® series

Ice Chip (Buddleia 'Ice Chip'):  18 to 24 inches high and 2 to 3 feet wide; low-spreading ground cover with white flowers