The Pennsylvania-Delaware Chapter of the International Society of Arboriculture was founded in 1960. The purpose of this organization is to foster a greater appreciation for shade trees and to promote the science, technology, and practice of professional arboriculture in the states of Pennsylvania and Delaware.


Register Now for the 53rd Annual Shade Tree Symposium

January 22 - 23, 2018 at the Lancaster Host Resort

Click HERE for more information and to register.  Early registration discount ends on December 31, 2017


Exhibitors, please fill out this form and submit it to druyak@penndelisa.org.


Become a Member

Penn Del ISA membership provides you with access to exclusive resources and discounts. An investment in a chapter membership pays itself back through discounts on continuing education, access to exclusive resources and content, and educational benefits that will advance your career.

Join Now

2017 Board Meetings

April 7th- Meeting in person: Location- Pittsburgh area
June 9th- Meeting in person: Location- Harrisburg area
August 11th- Conference call 9:00 am - 11:30 am
September 29th- Meeting in person - Delaware
December 8th- Meeting in person- at the Lancaster Host