Garden Pests and Diseases: small brow spots on hydrangea, 2 by irukandjia

irukandjia wrote:
I have a pretty large hydrangea outside my south facing window, and it seems overall to be very heathy. It's beautiful. I'm not sure exactly what kind it is, it was here when I moved in 4 years ago (northwest Ohio zone 6). Today I noticed these tiny brown spots on some of the leaves. it seems to be mainly the leaves facing the window (back of the plant). I did notice what looked like a Colorado potato beetle on one of the leaves (it was kind of skinny and had black and yellow stripes going lengthwise down its body and a red head). I couldn't find any pictures of anything similar or any indication that these beetles eat hydrangeas. It's also not really holes just brown spots. any ideas? I've included a picture of the plant from further back too so you can see its overall condition.