Pruning Standards (ANSI A300) Explained for ISA Candidates
Pruning is 16% of the ISA exam, the largest domain. Learn ANSI A300 standards, crown cleaning/thinning/raising/reduction, and the three-cut technique.
Chris ComerFebruary 18, 2025ISA Study Strategies
Study methods, retention systems, and weekly routines for passing the ISA Certified Arborist exam.
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Chris ComerFebruary 18, 2025Tree Biology and Physiology Cheat Sheet for ISA Candidates
Tree Biology is 10% of the ISA Certified Arborist exam. Master CODIT, xylem/phloem, reaction wood, and root anatomy with worked exam scenarios and a quick-reference cheat sheet.
Chris ComerFebruary 14, 2025Installation and Establishment: ISA Exam Study Notes
Covers tree planting techniques, nursery stock types, root flare depth, and establishment best practices for the ISA arborist exam.
Chris ComerFebruary 6, 2025Soil Management for the ISA Exam: Key Concepts and Common Questions
Soil management is 12% of the ISA exam and one of the hardest domains for experienced arborists. Study texture vs. structure, pH, CEC, compaction, and how to read a soil test.
Chris ComerFebruary 2, 202512-Week ISA Exam Study Plan (With 8-Week and 4-Week Variations)
A week-by-week ISA Certified Arborist exam study plan for 12, 8, and 4-week timelines, with domain order by weight and how long prep actually takes.
Chris ComerJanuary 29, 2025How Hard Is the ISA Certified Arborist Exam? What to Really Expect
Is the ISA Certified Arborist exam hard? The real format, the domains that trip up experienced arborists, and why 3 years in the field isn't enough.
Chris ComerJanuary 25, 2025ISA Certified Arborist Practice Questions and Mock Exam Strategy
How to use ISA practice questions and mock exams effectively: how many to take, how to score them, and how to categorize wrong answers so you fix the right problem.
Chris ComerJanuary 9, 2025ISA Certified Arborist Exam: The Complete Study Guide
Everything you need to know about the ISA Certified Arborist exam: format, domains, eligibility, how to become certified, and how to study. Written by ISA BCMA Chris Comer.
Chris ComerJanuary 5, 2025