William Johnston & Co., Inc.

Phone: 610-664-3200


Services for Trees:


Tree Pruning


Tree Removals




Shrub Renovation


Emergency Storm Damage

Plant Health Care:


Spray Services: Insect and Disease Control


Fertilization Treatments and Soil Amendments


Plant Growth Regulator and Trunk Injections


Deer Repellant Treatments and Anti-desiccant Sprays

Evaluation Services:


Test Bore Evaluations


Hazardous Tree Evaluations


Root Crown Excavations

Contact us


Root Crown Excavations


Improper installation of trees is a primary cause of decline in the landscape.  Often, we find trees that have been planted too deeply and have developed girdling and adventitious roots.  These roots form as a result of excess soil and mulch covering the base of trunk and can eventually encircle and constrict the vascular system of the tree. In addition, we often find plastic twine and other non-biodegradable materials embedded in the trunks of trees, below the surface.  We perform a root crown excavation to observe the conditions surrounding the trunk or stems below the surface.  This often provides an explanation as to why a plant appears to be stressed.  This process exposes these roots, along with other physical obstructions so that they may be removed.  From there, the area is re-graded, removing any organic matter from the actual trunk of the tree.  When the natural conditions are re-established around the base of the plant, the vascular tissue can then function properly, restoring the vitality of the plant.



Overmulched tree which can lead to adventitious roots

Adventitious roots which form in excessive mulch.

Strap left attached to root ball before planting and still attached beneath ground level.

Large girdling root.

Bartlett Tree Experts

William Johnston & Company is proud to be a division of Bartlett Tree Experts, and our staff now has the backing of an international tree-care company and tree research laboratory to help continue providing excellent tree service and shrub care in the Philadelphia and Main Line areas. View a complete list of professional tree services offered by Bartlett.