Buddleja 39argus velvet39 is a charming deciduous shrub that produces elegant arching panicles of rich purple flowers between june and september as the name suggests this butterfly bush attracts a wealth of pollinating insects to your garden and so is ideal for wildlife gardens as well as sunny borders buddleja 39argus velvet39 will form a practical bush with a rounded open habit and is effectively sterile so won39t seed about your garden height and spread 150cm 405934