Butterfly Bush3 Gallon Also called summer lilacs, Buddleja are hardy to Zone 5 and remain evergreen from Zone 8 south. Growing 5 to 10 feet tall, this large, arching shrub produces an abundance of flowerslong, spiked trussesin mainly purple and pink colors. The shrub grows well in perennial gardens or as a shrub border, and the flowers are good for cutting. Dont prune at the wrong time. Butterfly bush growth appears on new wood, so pruning should wait until the new