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Welcome to The Arboretum!

The Arboretum, University of Guelph, encompasses 400 acres of plant collections, gardens, walking trails, natural woodlands, wetlands, and meadows. Adjacent to the university's main campus, The Arboretum is free to the public and open dawn until dusk - we welcome you to visit!

Established in 1970, The Arboretum is home to more than 2000 different taxa of woody plants, organized into collections that include a synoptic World of Trees collection, as well as a Native Trees of Ontario collection, and noteworthy collections of Oaks and Beeches, Maples, and Conifers.

With a mandate to support teaching, research, and outreach at the university, The Arboretum is integral to many undergraduate courses, and acts as a 'living laboratory', providing support, expertise, and a wide variety of plants species and environments for researchers at all levels. We also offer dozens of workshops and other programs aimed at the general public, with the goal of helping to connect people with plants and nature.

We have a strong focus on the conservation of woody plants native to the province of Ontario. We lead long-running initiatives such as the Rare Woody Plants of Ontario program, through which we archive, in living gene banks, representative specimens of rare and at-risk trees and shrubs of the province. Our Elm Recovery Project is aimed at breeding a genetically diverse, Ontario-sourced American Elm population that is tolerant of Dutch Elm Disease.


Arboretum Explorer

Looking for a specific tree or shrub? Want to explore The Arboretum with an interactive map? Click here!


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Arboretum on Twitter

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Check out our November e-newsletter at

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Let the games begin... #projectfeederwatch has begun here at The Arboretum! Do you want to play and become a citize…

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Do you own a cat? If so, please consider taking part in this survey. Researchers at the Ontario Veterinary College…

Our Interpretive Naturalist Chris Earley was recently featured on CTV's 'In Your Backyard' video series! To see part 2 and 3 go to our videos page!

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