Community of Esteemed Arborists Advocating for the Highest Standards of Tree Care in St. Louis

Registered Arborist Directory

Homeowners and businesses interested in professional tree care and landscape design can find trusted and insured arborists listed in the member directory.

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What Is the St. Louis Arborist Association?

Founded in 1955 by Ken Kirk, Ed Schrader, and John Haberthier, the St. Louis Arborist Association is a nonprofit organization dedicated to advancing the skills, knowledge, and integrity of tree care professionals in the St. Louis area. The goal is to establish a culture of cooperation and high standards of care so we can preserve the health and longevity of our trees and improve the quality, beauty, and value of our St. Louis landscapes.

What is a Certified Arborist?

Arborists are skilled tree care professionals trained in the art and science of planting, assessing, and maintaining the health and safety of trees. An arborist should be certified through one or more professional organizations. Certification provides a measurable assessment of an individual’s knowledge and competence regarding proper tree care.

The basic accreditation for St. Louis Arborist Association professionals is certification through the International Society of Arboriculture (ISA). To be an ISA Certified Arborist, one must pass a comprehensive examination verifying they have knowledge in tree biology, safety, maintenance, planting, trimming and pruning, diagnosis, and other arboricultural standards.

To maintain certification, a certified arborist must continue their education and stay up-to-date on the latest scientific and technical advances in arboriculture. All arborists who are certified by the ISA must adhere to the Society's Code of Ethics

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Our Mission at St. Louis Arborist Association

We strive to elevate the standards of tree care in the St. Louis area, to foster a community of collaboration amongst members of the Association, and to increase public awareness about the advantages of working with qualified professional arborists who adhere to the latest industry standards.

St. Louis Arborist Events

Monthly meetings are held on the 2nd Tuesday of each month unless otherwise noted. Check the calendar frequently for training and guest speaker events, tours, and volunteer opportunities.

Thu, Oct 10
Beyond Housing Volunteer Tree Planting Event
Normandy City Hall
RSVP
Oct 10, 2024, 9:00 AM – 11:00 AM
Normandy City Hall, 7700 Natural Bridge Rd, St. Louis, MO 63121, USA
Beyond Housing is hosting a tree planting event at Normandy City Hall in collaboration with John Burroughs School, the City of Normandy, the Missouri Department of Conservation, and Forest ReLeaf.
Thu, Oct 24
MISSOURI PLANT HEALTHCARE - HALF DAY WORKSHOP
University of Missouri
RSVP
Oct 24, 2024, 7:30 AM – 1:30 PM
University of Missouri, 900 E Stadium Blvd, Columbia, MO 65201, USA
In partnership with the Midwest ISA chapter and the Missouri Community Forestry Council, we are hosting a FREE Plant Health Care (PHC) half day workshop. Plant Health Care has been an integral approach to Integrated Pest Management (IPM) for many years.

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Arborist team planting a new tree together

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Springtime Pruning

Pruning is one of the processes employed by arborists to restore the shape and structure of snow-damaged trees. Removing dead, broken and...

Interested in becoming a member of the St. Louis Arborist Association? Access an application via the website. The Association offers multiple different membership options, including Active, Contributing, Associate and Municipal. New members are “probationary” members until an Ethics review has been completed. Applicants interested in “Active” membership must include references.

Tree Care and
Arboriculture Resources

Learn more about tree care, maintenance, pests and diseases, and the role of professional arborists in preserving St. Louis’ trees. These quick-read articles highlight timely and locally focused information to help you make informed decisions about caring for your trees.

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Each month, the Association publishes a new article. Check the site regularly to stay up-to-date or subscribe for email updates.

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