Stump grinding is the process of grinding out a stump with a machine that generally goes approximately 6-8 inches below the surface, although it can go deeper or more shallow if specifically requested. Stump grinding is recommended if there is a concern for new growth and/or general appearance of the property. Some trees and shrubs, even when cut even with the ground, will still try to live and produce new growth. Grinding limits any of this growth that could occur. In addition, surface roots left behind from the removed tree or shrub can also be ground down below the surface.