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Become An ISA Certified Arborist

ISA Certified Arborist credential badgeTake your tree care career to the next level by becoming an ISA Certified Arborist. Let your customers know that you possess the high degree of knowledge that it takes to become certified by the International Society of Arboriculture. Tuesdays · 6:00 – 8:30 PM Dates: Sep 15, 22, 29 · Oct 6, 13, 20, 27 · Nov 3, 2026
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Become An ISA Certified Arborist

ISA Certified Arborist credential badge

Take your tree care career to the next level by becoming an ISA Certified Arborist. Let your customers know that you possess the high degree of knowledge that it takes to become certified by the International Society of Arboriculture.

Tuesdays · 6:00 – 8:30 PM

Dates: Sep 15, 22, 29 · Oct 6, 13, 20, 27 · Nov 3, 2026

Register for the course

Arborist Certification Study Guide, Fourth Edition is the program material covered in this course

Two mature trees at sunset with the sun flaring through a wooden fence
  • Week 1: Tree Biology, Tree Identification
  • Week 2: Soil Science, Pruning
  • Week 3: Water Management, Tree Selection
  • Week 4: Installation and Establishment, Tree Nutrition and Fertilizer
  • Week 5: Tree Support and Lightning Protection, Urban Forestry
  • Week 6: Diagnosis of Plant Disorders, Plant Healthcare
  • Week 7: Tree Assessment and Risk Management, Trees and Construction
  • ​Week 8: Tree Worker Safety, Climbing and Working in Trees
  • Week 9: Take the Arborist Certification Exam

You must apply and register separately with the ISA to take the exam. See our Exam Information page for details, or read the ISA’s common questions about certification.

Course Overview
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Frequently Asked Question

General Questions

The exam can be difficult, but not impossible. By attending this course, you will be more than prepared to pass the exam.

The exam contains 200 multiple-choice questions.

The time limit for the exam is 3.5 hours.

You need to score 76% to pass the exam. You need to respond correctly to 152 questions to maintain a 76%.
Looking up at the trunk and spreading branches of a large oak tree
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Take your tree care career to the next level by becoming an ISA Certified Arborist.

Let your customers know that you possess the high degree of knowledge that it takes to become certified by the International Society of Arboriculture.

Register For The Course

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