Bartlett Tree Experts (bartlett.com) has made sustainable landscapes thrive. Founded in 1907, Bartlett is a research-driven, family-owned and operated tree care company with 100 offices. Bartlett is the only private company in the National Plant Diagnostic Network.The Bartlett Tree Research Laboratory and Arboretum is located in Charlotte, NC on 400 acres and provides diagnostic, training and research support for the company and the industry.