Help! Leaves growing out distorted w/white foamy stuff on back
I have 3 hydrangeas that are approx. 3 yrs old. Two are doing great, but the 3rd one, some kind of mophead variety and a little smaller than the other two, is growing with extremely disformed curling leaves. I examined it last night, and found white foamy stuff on the backside of the curling leaves. The leaves are not dried or spotted, just not growing open and flat like they're supposed to. Do you know what the problem could be? It must be some kind of insect. How can I get rid of it?