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


Welcome to William Johnston & Company

Servicing the Philadelphia Main Line and surrounding areas



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.

Since 1929, William Johnston & Company has been serving the Main Line and Philadelphia areas in the care of trees, shrubs, turf and general plant health care for both residential and commercial properties. Many customers began their business relationship with the original Mr. Johnston and continue to this day to trust their properties to the professional and courteous staff.

The fully insured company offers ISA certified arborists on staff who are able to evaluate your property and offer suggestions for plant health care so you may utilize their services with total confidence and peace of mind.

Please take a look around at this website to read about the services the company offers and to see pictures of the staff in action.

When you have a project in mind, or if you need emergency work, please contact us by phone at 610-664-3200, or by using the contact form on bartlett.com.

Why Hire a Certified Arborist?


Is there really a difference between an arborist and a "tree guy"?


In this industry, there are professionally certified arborists, who are trained in the science of caring for trees.  This certification involves much more than purchasing a truck and a few chain saws.  Arborists are knowledgeable about the needs of trees and understand tree biology.


Being an ISA (International Society of Arboriculture) certified arborist provides the level of experience and education in the science of tree care as well as the training to make qualified assessments of a tree's health and safety.  Arborists must pass a comprehensive examination which is developed by the nation's leading tree experts.  They must also maintain this certification through continuing education which makes arborists more likely to be up to date on the latest techniques in arboriculture.


Arborists understand the relationship between all of the variables which affect tree health and have greater expertise in assessing the hazard potential of a tree.  Also, we adhere to industry standards for pruning.  I have seen some horrendous topping cuts made by well intentioned, but poorly educated "tree guys".  These are usually the low bid contractors who, in effect, tarnish the image of our industry. 


So, if you want to see the difference, talk to a tree guy, then schedule an appointment with a certified arborist.