The Columbus Landscape Association was the first sponsoring group to donate a section of the garden. Over $40,000 of plant materials and countless hours of time has been donated by member companies of CLA, with additional plants added each year. The conifer collection is used extensively in the plant sciences teaching and research programs and is located along Lane Avenue toward Olentangy River Road.
For many years the CLA also sponsored an annual student internship scholarship. Donald Moulton was a member of CLA and promoted the importance of providing internships for students. A internship scholarship in his name was given annually for a number of years and CLA followed his lead. These scholarships are dormant now, but they helped to jump start our early efforts to engage horticulture students in the care and maintenance of the Chadwick Arboretum.
The Columbus Landscape Association continues to provide mulch from the Home & Garden Show each year—a substantial donation to our gardens. CLA members meet in the Arboretum once each year for a monthly meeting. Many of their members are graduates of Ohio State University