arborists

An arborist is a professional who specializes in the care of trees. Arborists diagnose tree health, prune and trim canopies, plant or transplant trees, and provide guidance to reduce hazards and extend growth in residential, commercial, and urban settings.

Training and credentials vary by region, but many arborists complete formal study in arboriculture and accumulate field experience. A widely recognized credential is the ISA Certified Arborist, earned by passing an exam and maintaining ongoing education. Safety training for climbing and rigging is commonly required for field work.

Core duties include pruning dead or competing limbs, crown shaping, fertilization, pest and disease management, soil and root care, and tree removal when necessary. Arborists may install cabling or bracing for weak limbs, perform transplanting, and advise on tree preservation during construction.

Work settings range from private yards and landscaping firms to municipal parks and utility corridors. Professionals use climbing gear, chainsaws, and soil-testing tools, and they prioritize tree health, safety, and compliance with local regulations.

Organizations such as the International Society of Arboriculture and the Tree Care Industry Association publish standards, certifications, and ethics to guide professional practice and ongoing education in arboriculture.