Area root distribution vs. crown distribution. Most tree roots are located in the top 6 to 24 inches of the soil and occupy an area two to four times the diameter of the tree crown.
Roots obtain water, oxygen and minerals from soil.
They do not grow toward anything or in any particular direction. Soil compaction, change in soil depth and improper watering can injure roots, increasing stress and susceptibility to disease and Insects. To avoid root disease, maintain a healthy, vigorous environment around a tree. Once a root system is severely affected, the tree usually must be removed. The root system of a tree performs many vital functions.