Cutting through roots will not always kill a tree. Cutting surface roots or a small percentage of the roots does not kill a tree. Cutting into the supporting roots, however, causes the tree to topple and to eventually die, warns the University of Florida.
About this Author
Lisha Smith writes for several blogs and has freelanced for six years. She has a Bachelor of Arts from UNC-Greensboro in psychology. Smith has self-published several books. Her areas of experience include gardening, cooking, home improvement, pets and mental health.