I moved house in December and inherited a massive garden which is totally overgrown. Now we have done quite a bit of work already and in doing this I found 2 potted azaleas. They did come out in flower but it was rather sparse. So I thought I would give them a trim now to help them. They are very woody and there is not a lot of leaves on them either. If someone could tell me the best way to trim them back so I can get a decent flowering, I would appreciate it.