A dense canopy of foliage and a generous flower display combine to make Butterflybush a popular item in many southern landscapes. The plant is probably most popular because flowers attract many different butterflies and bees. It is one of the best plants for this purpose. Flower clusters range from 6-to 24-inches long. The olive-green, simple, hairy leaves have serrated margins and a lanceolate shape that flutter in the slightest breeze lending a fine texture to the landscape. Plants resist browsing by deer.Plants become a tangled, woody mess after a couple of years and will need to be cut back every now and then. Buddleia is grown as a herbaceous perennial as far north as hardiness zone 5.They are deciduous in the north, semi-evergreen in the south and attract many types of butterflies, bees, and hummingbirds. They grow in partial shade but flower production is reduced. Alkaline soil appears to support adequate growth in many instances. Butterflybush performs nicely in a container provided it is placed in a full sun location. In a container, it can be trained into a multi-trunked shrub resembling a small tree, but requires daily irrigation to maintain flowering and a good appearance. Butterflybush acts like a perennial in the northern end of its hardiness range getting killed to the ground each winter.Plants serve as butterfly nectar sources.