What Is a Butterfly Tree?
What Is a Butterfly Tree?. The butterfly tree (Buddleja davidii), or more commonly the butterfly bush, is a semi-evergreen to deciduous flowering shrub from Japan and northwestern China. The plant, also called summer lilac and buddleia, gets its name from its high attraction for butterflies. Butterfly bush is widely used as a foundation plant and...
The butterfly tree (Buddleja davidii), or more commonly the butterfly bush, is a semi-evergreen to deciduous flowering shrub from Japan and northwestern China. The plant, also called summer lilac and buddleia, gets its name from its high attraction for butterflies. Butterfly bush is widely used as a foundation plant and as a background planting with smaller-sized shrubs.
Plant Description
Butterfly tree or butterfly bush has a mature height of 6 to 12 feet, with a weeping growth habit. The shrub grows 4 to 15 feet wide and has 6- to 10-inch-long gray-green lance-shaped foliage that grows on long, arching stems. The hardy roots do not require very open areas to grow well, and thrive even under cramped conditions. The fast-growing shrub is highly heat-tolerant.
Flowers
The summer-blooming flowers are the main attraction of the butterfly bush. The small flowers cluster tightly to form 8- to 18-inch-long drooping cones that are heavy enough to make the stems bend under their weight. The fragrant flowers stay in bloom well into the first frost, and come in various shades of purple, red, pink or white, with orange throats. Certain cultivars also bloom with light blue or lavender blue flowers.
Attraction to Butterflies
Though the bright-colored flowers, with their nectar-filled centers, attract butterflies like a lot of other flowers, the attraction of the butterfly bush goes further than this. The plant also sends out a special honey-like scent that pulls in masses of butterflies like a magnet. After the scent attracts the butterflies, the insects start to feed on the nectar-rich blooms. The special scent of the butterfly tree also pulls in moths and hummingbirds.
Growth Requirements
The butterfly bush requires areas of full to partial sun for best growth and flower production. The plant is hardy in USDA Zones 5 to 10. Though the shrub dies down to the ground in Zones 5 and 6, it regrows rapidly in spring. Select a very well-drained and moderately dry soil. The shrub is not fussy about fertility or soil pH. Avoid wet soil, as this is likely to cause root rot. Deadheading the flower clusters prolongs bloom time. The shrub propagates easily with cuttings taken in summer.
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