Klehm Arboretum & Botanic Garden (63 ha / 155 acres) is a nonprofit arboretum and botanical garden located at 2715 South Main Street, Rockford, Illinois. The arboretum was first established in 1910 as Rockford Nursery by landscape architect William Lincoln Taylor, who planted many of the arboretum's trees. The Klehm family purchased the nursery in 1968 and maintained it until 1985, when they donated the property to the Winnebago County Forest Preserve District as an arboretum.