University of Guelph Arboretum, Arboretum in Guelph, Ontario, Canada

The University of Guelph Arboretum is a botanical research facility spanning about 165 hectares with 40 distinct collections of woody plants, specialized gardens, walking trails, natural woodlands, and wetland areas. The grounds combine research zones with publicly accessible garden areas and nature paths for visitors to explore.

The Arboretum was founded in 1970, developing from agricultural test plots of the Ontario Agricultural College that had previously been used for farming research. This transformation created a center dedicated to plant conservation and botanical study.

The Arboretum lies on Dish with One Spoon territory, treaty lands of the Mississaugas of the Credit, and the Between the Lakes Treaty 3 lands. Its grounds hold display gardens and memorial plantings among more than 40 woody-plant collections, and the site is used for weddings, ceremonies, school programs and adult workshops.

The grounds are open all year and admission is free. The 12.5 km of trails cross 165 hectares but do not enter the 40-hectare nature reserve south of Stone Road East, which is closed to the public. The Discovery Trail links the main collections and gardens.

The gene bank has archived over 30 species of rare woody plants since 1979, held across research plots and formal collections. The Elm Recovery Project, running since 1998, works to reintroduce genetically diverse, disease-tolerant white elms to the Ontario landscape.