Hi,
This seemed to come out of nowhere, and is now affecting several of my Rose of Sharons. The spots are yellow. They don't appear to be raised. I've tried to read about the usual diseases-fungus and bacteria, or insects, but didn't see examples like this. My best guess is insects. There do not appear to be any blemishes on the stalks, only the leaves. Someone mentioned that yellow leaves could be overwatering (we have clay soil that I've tried amending with compost and leaf mulch), but I wouldn't think that would cause spots like this.
Thank you for any help.
Jacki
