We have a potted lemon tree that we have had for almost 25 years. It is about three and a half feet tall and pretty "bushy" we have to keep it trimmed back or it will get too big to bring in every winter. It even produces lemons occasionally. Every few years it will drop most of it's leaves in the winter and go dormant. but come summer it comes back with a lot of new growth. We have had it so long it is a part of the family.