QuestionsHow to growTrees and ShrubsPruningholly 0 Vote Up Vote Down Ray Dow asked 13 years ago I got a couple of green hollies. They are quite tall but a bit thin. If i prune them will they bush out a bit more? And how much can you take off them? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Holly will take a shape if clipped and pruned and you can take off as much as you like.