My oldest, a lemon tree, sits in the back yard at the moment near the onion bed. It needs a little more sun and water than it has been getting so I might have to move it up front where the kaffir lime sits. There are other citrus plants in the area in other yards so there shouldn't be any problem with fruiting once it starts to flower.
I'll probably need to repot it soon so it has more room to grow. I hope to keep it 6-8 feet tall unless I get around to building a large greenhouse. Then who knows how big it may get.