Invasive plants in High Park

Invasive plant species pose some of the greatest challenges to the preservation and restoration of High Park's natural environment. To learn more about how City staff and volunteers are dealing with these species, see Controlling Invasive Plants and High Park Stewards.

Greater Celandine Field. Photo: Sharon Lovett
Greater Celandine Field. Photo: Sharon Lovett

Herbaceous Plants

  • Dog-strangling Vine
  • Garlic Mustard
  • Sweet-white Clover
  • Himalayan Balsam
  • Purple Loosestrife
  • Greater Celandine
  • Japanese Knotweed
  • Japanese Hedge Parsley

Shrubs & Trees

  • Common/European Buckthorn
  • Euonymus
  • Asian Bittersweet
  • Tree of Heaven
  • Norway Maple

See also Phragmites

Is this plant native or invasive?

Test your knowledge: guess first and then move your cursor over the photo (or touch the photo) to check your answer.

Canada Anemone

Garlic Mustard

Purple Raspberry

Himalayan Balsam

White Sweet Clover

Meadow Rue

Sassafras

European Spindletree

Black Oak

Norway Maple

Greater Celandine

St John's-wort

Wintergreen

Tartarian Honeysuckle

Glossy Buckthorn

Japanese Knotweed

Garlic Mustard field. Photo: Sharon Lovett
Garlic Mustard field. Photo: Sharon Lovett

Invasive Plants Resources

Quick guides

References and documents

More resources and websites

Articles, Galleries and Guides

What's New?

TRCA’s 2019 Terrestrial Biological Inventory of High Park

Presentation Link and Follow-Up Q&As now available! Learn about the Toronto & Region Conservation Authority’s methodology, findings and observations as presented in the final High Park Terrestrial Biological Inventory Report, 2019. A question and answer opportunity followed the presentation. Urban…

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