I've a 2 hedges of photinia and it doesn't seem to mind when or how it's pruned but obviously don't do it if there's going to be frost - ends of the twigs go black, just cut any black out when it's warmer. I use a hedge trimmer and it thickens up grows back red shoots in no time. Feed it a rose, bush & shrub fertisliser if the leaves start to yellow. I've never replanted one so I can't help you there.