I planted a young bald cypress tree a couple of years ago. It's approximately 10 feet tall and a couple of inches in diameter. I really love this tree and want to keep it but I'm nervous that the knees/roots are going to come up in my neighbor's yard which is about 15 away. I read that if you put a slab of concrete on one side of the tree it will keep the knees from coming up in that direction. Is there any truth to this? I could actually put a patio between the tree and the fence if that is true. I also heard that I could put some type of barrier in the ground. I don't mind the knees in my yard so I am only concerned about one side of it. I want to keep this tree and would appreciate any help you could give me. Thanks so much.