What is an Arborist?

Certified Arborists

Certified Arborists are tree care specialists dedicated to excellence in the field of Arboriculture. They are highly qualified in the care of your valuable trees and shrubs with knowledge of the most up-to-date advances, and proven techniques.
Certified Arborists are widely recognized professionals. They are educated and trained in:


  • Diagnosis and treatment of your tree and shrub related problems

  • Proper pruning and management techniques for your valuable trees   and shrubs.

  • Understanding tree biology.

  • Identifying and selecting the appropriate trees and shrubs for your landscape.

  • Understanding the delicate soil and water relationships which affect   tree and shrub health.

  • Nutrition requirements and fertilization techniques to keep your trees and shrubs in peak form.

  • Recognizing certain tree hazards and construction damage.


To maintain and beautify the world around us, residential property, commercial property, or the town you live in, Certified Arborists are there to help you.
To qualify as a Certified Arborist, an experienced tree care professional must pass an extensive examination developed by an international panel of experts in the industry and academia. The International Society of Arboriculture maintains this voluntary certification program.
This educational program does not stop with testing. A Certified Arborist must keep abreast of new technology, by attending seminars and reviewing the latest publications to obtain necessary continuing education credits.
In today's fragile environment, a Certified Arborist can maintain your landscape your landscape and help you preserve the aesthetic and ecological value of your trees and shrubs.


An arborist by definition is an individual who is trained in the art and science of planting, caring for, and maintaining individual trees. ISA arborist certification is a nongovernmental, voluntary process by which individuals can document their base of knowledge. It operates without mandate of law and is an internal, self-regulating device administered by the International Society of Arboriculture. Certification provides a measurable assessment of an individual’s knowledge and competence required to provide proper tree care.
Certification is not a measure of standards of practice. Certification can attest to the tree knowledge of an individual but cannot guarantee or ensure quality performance.
Certified Arborists are individuals who have achieved a level of knowledge in the art and science of tree care through experience and by passing a comprehensive examination developed by some of the nation’s leading experts on tree care. Certified Arborists must also continue their education to maintain their certification. Therefore, they are more likely to be up to date on the latest techniques in arboriculture.


Why Hire an Arborist?

An arborist is a specialist in the care of individual trees. Arborists are knowledgeable about the needs of trees and are trained and equipped to provide proper care. Hiring an arborist is a decision that should not be taken lightly. Proper tree care is an investment that can lead to substantial returns. Well-cared-for trees are attractive and can add considerable value to your property. Poorly maintained trees can be a significant liability. Pruning or removing trees, especially large trees, can be dangerous work. Tree work should be done only by those trained and equipped to work safely in trees.

The Consulting Arborist - Dedicated to the Protection of our Greatest Natural Resource

For many people, trees are an automatic, self-sustaining part of our world. Trees are a source of shade, air conditioning and visual appeal that are "just there" - often overlooked, and sadly taken for granted.
Trees in our developed environment present a challenge, requiring careful planning and vigilant maintenance. The shared public trust of governments, businesses and homeowners is responsible for tree plantings that grow, thrive and remain safe. And when a problem occurs - if a tree causes damage or becomes a public safety hazard - a source for advice and mediation is often needed.
The role of the consulting arborist is to bring a comprehensive, objective viewpoint to the diagnosis, appraisal and evaluation of arboricultural issues. Consulting arborists can serve a variety of needs:


  • For lawyers: we provide expert witness testimony in cases that involve damage or injury related to trees.

  • For insurance companies: we provide appraisals to determine a tree's value in property claims.

  • For developers, planners and landscape architects: we provide evaluation of the environmental impact on development, long-term planning for placement and maintenance of trees, inspection of plant material, and information regarding the preservation of existing trees.

  • For municipalities: we provide evaluation and planning for long-term public plantings and help to develop tree-related ordinances.

  • For homeowners: we provide full-service consultation for evaluation, planning and preservation of trees.


The ASCA Difference - Commitment to Excellence

The American Society of Consulting Arborists (ASCA) is a non-profit professional society created to develop and preserve the highest standards of performance in the field of arboricultural consulting. Through training, networking and mentoring, ASCA's goal is to complement its members' technical knowledge with the communications and management skills needed for professional consulting.

ASCA Membership is Challenging

Registered Consulting Arborists must meet stringent requirements for technical education and experience, complete the Arboricultural Consulting Academy's program, and produce a series of consulting reports that meet strict professional review standards.

Solutions for the Real World

The Arboricultural Consulting Academy's curriculum follows a case study format and is taught by nationally recognized faculty. Its courses investigate four key areas of consultation skills: technical writing and report presentation, training as an expert witness, consulting ethics, and management.

A Valued Professional Credential

The ASCA designation, "Registered Consulting Arborist," gives recognition, authority and credibility to its members' practices.

ASCA's Mission Statement

The American Society of Consulting Arborists advances the arboricultural consulting professional by promoting public awareness and enhancing the knowledge, skills and practice of its members.