Seminars & Workshops

ISA ONTARIO OFFERS MANY WORKSHOPS during the year for members and non-members. These educational events are advertised in the Ontario Arborist magazine, through email blasts to our members and here, online. CEUs are available to workshop participants.

For a list of our future workshops, click this link...


Basic Tree Appraisal Workshop
with James Komen

Monday, March 19, 2018
Richmond Hill Centre for the Performing Arts
10268 Yonge Street
Richmond Hill, ON

COST:  ISAO Ontario Members:  $155
Non-members: $195
Students:  $100

                                                      Registration form HERE

Focusing on the CTLA Trunk Formula Method, this workshop gives an overview of the appraisal process and provides an opportunity to practice in the field. Participants will review common mistakes and refine their craft as appraising arborists.

The first portion of the course is a lecture that discusses the four primary components of the formula: trunk area, species rating, location rating, and condition rating. Next, the error associated with each component is identified, and recommendations are given for reducing error.The second half of the course is a field application of the concepts discussed in the lecture. Participants will divide into groups and appraise several trees. The class will reconvene and discuss the results.


Our mission is to enhance and promote the care and benefit of trees for present and future generations in Ontario through education, research and awareness.