can I get some help please? I must be the worst gardener in the world. People tell me hydrangeas are easy to grow and like semi shade or sun. I planted a hydrangea last year, a lace cap , in the back garden . By autumn it was just a stem. Totally dead. One month ago I bought hydrangea blue wave. I planted it in the front garden( North facing but gets afternoon sun) I enclose a picture of it. The leaves are very withered looking and it doesn't look at all well.
Any advice please as it's very disheartening. I thought it would provide some lovely summer colour to my North facing garden. I can't think what I'm doing wrong.