What can be used to treat powdery mildew on peony plants?

Asked July 17, 2014, 5:50 PM EDT

What can be used to treat powdery mildew on peony plants?

Carlton County Minnesota

1 Response

It usually isn't necessary to treat powdery mildew on ornamental plants. The wet weather this year has been a factor. Fungicides won't stop the mildew now but will prevent more from starting. You should make sure that you clean up the foliage in the fall and dispose of it. If your plants are in a sunny area with good air movement it probably won't be a problem. Here is a link to info about powdery mildew and how to deal with it. http://www.extension.umn.edu/garden/yard-garden/flowers/powdery-mildew-on-ornamental-plants/.