Answer: The flowers of butterfly bushes provide nectar for adult butterflies and the leaves provide nourishment for butterfly larvae. I wouldn't be at all surprised to find caterpillars (future generation of new butterflies) are feeding on your butterfly bush. If you kill off these caterpillars, you'll kill the next generation of butterflies. I hope you can live with the plant damage. While it doesn't look very attractive to gardeners, the shrub will survive, and so will a bounty of butterflies.
Q&A Library Searching Tips