If you are planting a small tree in your yard it is important to realize that the tree is going to get bigger, and sometimes they can be thirty to forty feet tall. Trees this tall will have roots that will be twenty to thirty feet long sometimes as well. You need to be careful how close tree roots get to your foundation, your water lines and your sewage lines so that you don't have problems in twenty years. Just a tip to keep in mind when planting trees!
