I have three different varieties of butterfly bush and all are thriving. I live out west where the plants are not invasive. I give them a hard pruning in January or February and deadhead throughout the year. I learned from a nurseryperson to give them an overhead spray of water during the dusty summer months. If let go, the plants' stomas (pores) become clogged, the plant lets out a distress call alerting neighboring plants and hungry insects. Since I've followed the nurseryperson's advice I've had no problems. I've found the plant lives up to its name by attracting a variety of butterflies (and bees).
I have three different varieties of butterfly bush and all are thriving. I live out west where the plants are not invasive. I give them a hard pruning in January or February and deadhead throughout the year. I learned from a nurseryperson to give them an overhead spray of water during the dusty summer months. If let go, the plants' stomas (pores) become clogged, the plant lets out a distress call alerting neighboring plants and hungry insects. Since I've followed the nurseryperson's advice I've had no problems. I've found the plant lives up to its name by attracting a variety of butterflies (and bees).