How It Works
What a 6-Inch Grinding Depth Actually Means for Your Yard
Six inches below grade is a specific number, not an arbitrary one. Here's what it's actually protecting against.
It's Below Where Roots and Mowers Interact
Grinding at least 6 inches below grade gets well below where surface roots typically sit and where a mower blade or foot traffic would otherwise catch on remaining wood. Shallower grinding risks leaving material close enough to the surface to cause exactly the problems the job is meant to solve.
It Leaves Room for Backfill
That depth also leaves enough space for topsoil backfill to sit level with the surrounding lawn, rather than sitting as a shallow patch that settles unevenly compared to the yard around it.
It Applies Regardless of Stump Size
This depth standard holds whether the stump is a small ornamental tree or a large, older tree. The equipment and approach may differ, but the depth target stays the same because the underlying reasons for it, root and mower clearance, don't change with size.
What It Doesn't Do
Grinding to depth removes the visible stump and most of the root flare, but it doesn't remove the entire root system, which can extend well beyond the grinding area. Raised roots nearby can be addressed separately as part of the job.
Common questions
Why 6 inches specifically?
It's deep enough to clear where surface roots and mower blades typically interact, and it leaves room for topsoil backfill to sit level with the yard.
Does grinding depth change for bigger stumps?
The approach and equipment may differ, but the depth target stays the same regardless of stump size.
Does grinding remove the whole root system?
No, it removes the stump and most of the root flare, but roots can extend beyond the grinding area. Raised roots nearby can be handled separately.