2 articles, sorted by most recent.
How hard is the ISA Certified Arborist exam?
Pass rates, why first-time test-takers struggle, the four most-missed domains, and how to study so the exam feels easier than it is.
April 30, 2026
Tree biology for the ISA exam: CODIT, the cambium, and the branch collar
The three concepts that dominate the Tree Biology section of the ISA Certified Arborist exam — explained the way the questions actually test them.
April 30, 2026