The Organiztion of the Saint Louis Arborist Association began in 1956 and has continued since then.


The mission of the Association is to improve the practice of tree preservation, to stimulate a greater interest in the planting and preservation of ornamental trees, to cooperate in the conservation of trees and in the beautification of the landscape, to initiate and foster scientific investigation into insect and disease problems of the region’s trees, to disseminate information, instruction and knowledge to the public concerning tree preservation, to secure better cooperation among arborists, to adopt all standards established by the National Arborist Association and insure all members adhere to these pruning standards.