Diseases of a Butterfly Bush
My butterfly bush has brown/round spots on all of the leaves, even the new growth. The spots run in small clusters and some even in lines. I know it is probably some kind of "bug" but how do I save the bush and rid the bugs?
Certified GKH Gardening Expert
It actually sounds like a fungus. There are a few that it could be but for the most part, they can all be treated with a fungicide. Treat the plant with a fungicide if copper sulfate or neem oil.