I re- potted my japanese maple in April and think I damaged the tap root . All the new growth shrivelled and later some of the smaller branches looked dead . I was advised to prune these off so I have and now it looks really sorry for itself . It's not in wind sun etc. and I used the correct potting mix and given it a weak feed. I'm gutted It's my favourite little tree. Cost me 50p in a sale when it was a twig and it' about 2 ft had it 6 years . Think it's a acer palmatum bloodgood. Any advice ?