Invasive Species

close up of garlic mustard flower

Garlic Mustard

Terrestrial Invasive Plants are plants that have been moved from their native habitat to an introduced area where they are able to reproduce quickly and crowd out native species. These plants impact our forests resulting in economic, ecological or social disruption.

Terrestrial plants in a forest ecosystem can be a tree, shrub or herbaceous plant. These plants are introduced and spread by infested packaging material, seed dispersal by both environmental and human sources, or by escaping from gardens.

Some of the most common invasive plants are: Common Buckthorn, Dog-Strangling Vine, Garlic Mustard, Giant Hogweed, Himalayan Balsam, invasive ground covers such as Periwinkle, invasive Honeysuckles, Invasive Phragmites, Japanese Barberry, Japanese Knotweed, Wild Parsnip, and Winged Euonymus. A few of these species are found in Wilderness Park. (See the Plant Inventory for more details)

You can help prevent the spread of unwanted terrestrial plants.

  • Learn to identify terrestrial invasive plants that are a threat to Ontario and how to effectively manage these species on your property. See The Landowners Guide to Controlling Invasive Woodland Plants (4MB PDF Download).
  • Avoid using invasive plants in gardens and landscaping
  • Buy native or non-invasive plants from reputable garden suppliers. Native plants provide habitat and food source for native wildlife
  • When hiking, prevent the spread of invasive plants by staying on the trails and keeping pets on a leash