The Ash Woodland is one of the few naturally regenerated wooded areas at the Jardin botanique. The path through the woodland is popular with walkers and nature lovers. The canopy here is dominated by close to 500 red ash trees (Fraxinus pennsylvanica) and more than 200 American elms (Ulmus americana). Until recently, however, there were a number of invasive species in the undergrowth and very few native species.
The Ash Woodland restoration project was launched in May 2008 with funding received by the Friends of the Montréal Botanical Garden through the Environment Canada EcoAction Program and the support of different partners. The work began with the removal of thousands of buckthorn (Rhamnus cathartica) and cow parsley (Anthriscus sylvestris) plants, both invasive species. Then a wide variety of suitable native plants including trees, shrubs, ferns and grasses were added.