Canadian Council on Invasive Species | CCIS

Read Highlights of the National Invasive Species Forum

Ottawa | Feb 28 - Mar 2, 2017

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Canadian Council

on Invasive Species

Ornamental and Horticultural Invasive Plants of National Importance

As Grow Me Instead resources and Be PlantWise programs grow across Canada, it has become important for the CCIS to facilitate data sharing. Using available lists of invasive species from each province or territory, the CCIS has compiled a list of the most important and “unwanted” horticultural plants across Canada. These lists are searchable by plant name and by jurisdiction. Only species identified by regions with available Grow Me Instead guides (Yukon, British Columbia, Alberta, Saskatchewan, Manitoba, and Ontario), in addition to regions with similar or developing programs (QC, including Je te remplace, PEI and NWT) are included in these lists.

For each unwanted species, you will find the following information:

  • full species name and popular common names 
  • a list of which provinces and/or territories the species is identified as unwanted through regional regulation and/or Grow Me Instead programs (with common names in English and French)
  • regulation by federal and provincial legislation, if applicable
  • for more information on each species, links to jurisdictional fact sheets in both official languages are provided, if available. 

General information on the most important invasive horticultural plants in Canada:

  • 86 species have been identified (see alphabetical listing) 
  • 34 of these species are also regulated provincially and/or federally
  • All species are invasive in more than one province and/or territory
  • None of the species are native within Canada, but not all are considered a priority invasive (or problematic weed) in every jurisdiction where they occur
  • The top 10 most unwanted plants are listed on six or more Grow Me Instead guides and are regulated in at least one jurisdiction. 
  • Several of these species have also been identified as the 100 worst invasive alien species by the International Union for Conservation of Nature (IUCN)
  • Not all provinces and territories have used the same criteria to generate their lists of “most unwanted” horticultural plants. Differences between regions are often due to differences in local priorities and should not be taken as statements on invasiveness.
  • Occurrence data for each species can be found at Database for Vascular Plants in Canada 

Lists of Ornamental and Horticultural Invasive Plants of National Importance:

Across Canada

  • Table 1. Species identified across Canada as important horticultural invasive plants by common name

Provinces and Territories

  • Table 2. Yukon Territory: Highest priority important invasive horticultural plants
    - Yukon Invasive Species Council species fact sheets
  • Table 3. North West Territories: Highest priority important invasive horticultural plants
  • Table 4. British Columbia: Highest priority important invasive horticultural plants
    - Invasive Species Council of BC fact sheets
  • Table 5. Alberta: Highest priority important invasive horticultural plants
    - Alberta Invasive Species Council fact sheets
  • Table 6. Saskatchewan: Highest priority important invasive horticultural plants
    - Saskatchewan Invasive Species council fact sheets
  • Table 7. Manitoba: Highest priority important invasive horticultural plants
    - Manitoba Invasive Species council terrestrial fact sheets, and aquatic fact sheets
  • Table 8. Ontario: Highest priority important invasive horticultural plants
    - Ontario Invasive Plant council fact sheets
  • Table 9. Quebec: Highest priority important invasive horticultural plants
  • Table 10. New Brunswick: Highest priority important invasive horticultural plants
  • Table 11. Prince Edward Island: Highest priority important invasive horticultural plants.
    - PEI Invasive Species Council fact sheets