Hydrangea Petiolaris- is this a virus?
My Hydrangea Petiolaris out leaves were badly caught by a late frost, so I had to trim of some of the leaves once frost had passed. I now notice this bubbling of the leaves between all the little veins. What is it, and what should I do about it? I have 'Mosaic virus' in my head- which I think a nearby buddleia (no longer around) once had some years ago.