The Jesse Hepler Lilac Arboretum was located on the University of New Hampshire campus in Durham, New Hampshire, USA, at 4 Library Way,[1] from 1940 to 1980.
Jesse R. Hepler was acting chairman of the horticulture department in 1938, and suggested establishing a lilac arboretum on the slope behind Thompson Hall, a site that became known as Lilac Hill. It was dedicated in 1940, and in 1948 many of the research species were relocated there.[2] It had 100 varieties of lilac (Syringa species) in seven color classes.[3] By 1980, the genetic range had diminished due to cross breeding, and the decision was taken to uproot the arboretum. The lilac is the state flower of New Hampshire,[4] and the plants were offered to the campus community. Lilac lovers wanting plants for their gardens cleared the site within 90 minutes.[2] The continuing research into lilacs was moved to the UNH Horticultural Research facility at Woodman Farm, Spinney Lane, in Durham (at