pruning a sliver birch to stop it getting too high.

Question

where do I prune the leader and how many of the little branches do I remove completely?

Answer 1

This would definitely be a good way to control its height! Where you want to cut it is up to you, though. If you want a single trunk tree, then you can remove anything that isn't on the leader that you are keeping. Otherwise, if you would like a more bush like plant, then you can leave any branches that you wish. It is always best to do this during dormancy, or at least when this is not actively growing.