Some of the most important lessons in arboricul‑ ture are still passed from one arborist to another the old-fashioned way.
The Arborists Who Built Us Why Knowledge Transfer Still Matters in Modern Tree Care By W. Jim Cortese
tween work sites listening to experienced arbor- ists explain why certain mistakes should never be repeated. The tree care industry has always depended on ex- perienced professionals passing knowledge down to the next generation. Without that process, arbo- riculture simply reinvents the wheel over and over again. Good mentors teach more than climbing systems and pruning cuts — they teach judgment. Judgment may be one of the least discussed but most valuable skills in arboriculture. Every day, arborists balance biology, safety, risk management, client ex- pectations, aesthetics, and practical realities. Text- books can explain proper pruning techniques, but experience teaches restraint. Experience teaches when a tree can reasonably be preserved and when removal is the responsible recommendation. Experi- ence teaches when a client needs education rather than agreement. Some of the most important lessons in arboricul- ture are still passed from one arborist to another the old-fashioned way.
There was a time in the tree care industry when many so-called “tree experts” owned little more than a pickup truck, a chainsaw, and a strong back. Formal credentials were uncommon. Safety stan- dards varied widely. Much of what young arborists learned came from observation, mistakes, and the willingness of experienced professionals to share what they knew. The technical side of arboriculture has changed tremendously over the last 50 years. Equipment is better. Research is better. Safety culture is stronger. Tree biology is better understood. Modern arborists have access to tools and information that previous generations could scarcely imagine. Yet one of the most important aspects of tree work has changed very little — arboriculture remains a profession built on mentorship. A PROFESSION BUILT ON MENTORSHIP Most of the lessons that truly shape an arborist are not learned from textbooks or PowerPoint pre- sentations. They are learned on jobsites, during pre-dawn tailgate meetings, while dragging brush at the end of a long day, or during long drives be-
ArborTIMES ™ Summer 2026 | 43
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