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.

There are currently over eight hundred members in the chapter including commercial, consulting, municipal, and utility arborists, researchers and educators, horticulturists, and individuals interested in the care of trees and landscapes.

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

Tree Climbing Championships 2016

Join us for the first-ever unified Tree Climbing Competitions on June 4-5, 2016 at Deep Creek Park in Green Lane, PA. Preliminary competitions will be held on June 4 in each of the five categories. The Masters Championship will be held June 5! The winner will go on to represent the chapter at the 2017 ITCC!

Register Now