Some of the leaves on our large maples are looking white. Is there a problem with powdery mildew on the native trees this year? Can theses leaves be composted if it is powdery mildew?
This is very common, and won’t affect composting.
There’s a big problem with powdery mildew on a lot of things this year. I also have some big leaf maples that look like this. One of my mint plant looked like this for a while then smartened up.