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.


Workshop 1:  “Getting to the ROOT of the Issue”
Date:  Tuesday, 24th April 2018
With Dr. Ed Gilman

Location: Guelph Arboretum,  College Ave E, Guelph, ON N1G 2W1

Workshop Summary: Can you imagine an entire day discussing the practical aspects of roots… I can. Come experience what I saw from 1977 through the present excavating more than 3,000 tree root systems in eastern North America. There will be photos, videos, specifications, strategies, and discussion-lots of discussion of how to manage roots. Full Prospectus HERE

Workshop 2:  “Tree Biomechanics & Management: Why We Should Care &
How to Execute It

Date:  Friday, 27th April, 2018
With Dr. Ed Gilman

Location:  Three Sisters Hall, Canada Agriculture and Food Museum
901 Prince of Wales Drive, Ottawa, ON, K2C 3K1

Workshop Summary:   This workshop is packed full of advanced information on pruning.  Ever wondered how and why most trees remain intact while others break apart? Prune at planting?  I thought we didn’t do that – I will show you the way!  Pruning plays a major role in a tree’s longevity & advanced pruning techniques have a great impact on how the tree responds to gravity, wind and storms; Nursery stock specifications will be described, with examples; Tree Preservation strategies: develop an easy-to-use system of pruning trees of any age that is simple to teach to customers and staff; Writing pruning specifications:  how to access, modify, and write pruning specifications.  Full Prospectus HERE.

ISA Ontario Member:  $155;  Non-member:  $195;  Student:  $100.

BOTH WORKSHOPS (Guelph & Ottawa):
ISA Ontario Member:  $290;  Non-member:  $370; Student; n/a.

Prices include HST & Lunch.  CEUs are available.




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.