Lace cap hydrangea yellowing and losing leaves after transplant
I've got a lace cap hydrangea that I had planted in the spring in a very shady spot on the side of my house with a northwestern exposure. It never did that well there, and appeared to be trying to grow up towards a better lit area, so I moved it about 3 weeks ago to a much sunnier spot with a northeastern exposure.
Our soil is mostly clay, but I tried to condition it with topsoil and sphagnum moss before transplanting, and after the transplant I watered very thoroughly by leaving the garden hose on a low stream right above the rootball.
Since then, the plant's condition has deteriorated dramatically. It has lost a lot of leaves, and most of the remaining leaves are yellow and spotted. I've attached some pictures below.
Does anyone have any idea what I've managed to do wrong to this poor plant? I'd love to save it, if I could.
Thanks very much.
Here is a link that might be useful: Recent photo of plant