Home » Invaders » Terrestrial Invasive Plants
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Common Buckthorn
Rhamnus cathartica

Dog Strangling Vine (Vincetoxicum rossicum) photo by Ken Towle
Dog-Strangling Vine
Vincetoxicum rossicum

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Garlic Mustard
Alliaria petiolata

Giant Hogweed (Heracleum mantegazzianum) photo by  Karen Rimmer
Giant Hogweed
Heracleum mantegazzianum

Himalayan Balsam (Impatiens glandulifera) photo by Jan Samanek, State Phytosanitary Administration
Himalayan Balsam
Impatiens glandulifera

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Invasive Ground Covers

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Invasive Honeysuckles

Invasive Phragmites (Phragmites australis subsp. australis) photo by Wasyl Bakowsky
Invasive Phragmites
Phragmites australis subsp. australis

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Japanese Barberry
Berberis thunbergii

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Japanese Knotweed
Fallopia japonica

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Japanese Stilt Grass
Microstegium vimineum

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Kudzu
Pueraria montana

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Miscanthus
Miscanthus sinensis & M. sacchariflorus

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Purple Loosestrife
Lythrum salicaria

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Wild Chervil
Anthriscus sylvestris

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Wild Parsnip
Pastinaca sativa

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Winged Euonymus
Euonymus alata

Terrestrial Invasive Plants

Terrestrial PlantsTerrestrial 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.

Terrestrial plants impact Ontario’s biodiversity, as well as our economy, agriculture, forestry, and outdoor recreational activities.

You can help prevent the spread of unwanted terrestrial plant species.

  • Learn to identify terrestrial invasive plant species 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
  • Avoid using invasive plants in gardens and landscaping
  • Buy native or non-invasive plants from reputable garden suppliers. Native plants provide habitat and food sources for native wildlife. See Grow Me Instead: Beautiful Non-Invasive Plants for Your Garden
  • Dispose of invasive plants in the garbage. Do not put them in the compost or discard them in natural areas. Discarded flowers may produce seeds
  • When hiking, prevent the spread of invasive plants by staying on trails and keeping pets on a leash
  • Report all sightings to the Invading Species Hotline 1-800-563-7711 or report a sighting online

Icon of Quick Reference Guide to Invasive Plant Species Quick Reference Guide to Invasive Plant Species (2.5 MiB)

Tartarian Honeysuckle (Lonicera tatarica) photo by Patrick Breen, Oregon State University Dog Strangling Vine (Vincetoxicum rossicum) photo by Greg Bales, Ministry of Natural Resources (MNR) buckthorn-common-1-credit-credit-valley-conservation-authority Garlic Mustard (Alliaria petiolata) photo by Ken Towle Himalayan Balsam (Impatiens glandulifera) photo by Jan Samanek, State Phytosanitary Administration