Butterfly Bush, Monarch Glass Slippers #3Buddleia 'Monarch 'Glass Slippers' Buddleia davidii Butterfly bush is an Asian shrub that grows quickly, is deciduous, and can withstand drought. Plant it in soil that drains properly and in full sun. From July until the first frost, flowers develop on fresh growth. In late winter, when the plant is heavily clipped, the nicest blossoms are produced. It is a great option for bulk planting as a border for summer flowering shrubs.