CIPC - Priority Invasive Plants

There are a number of invasive plant species in Coastal BC.
Download our most recent priority list here (PDF - 38KB)

Giant Hogweed

Giant hogweed (Heracleum mantegazzianum) is an aggressive invader that was first introduced to North America as a garden ornamental. It closely resembles our native plant cow parsnip, except the taller giant hogweed can grow up to 6-metres or more.

Giant hogweed reproduces through seed and perennial buds and can be found along roadsides and stream banks throughout southern Vancouver Island and the Gulf Islands. In riparian areas it forms a dense canopy, out-competing native species and causing stream bank erosion. The stem presents a significant threat to human and animal health as it exudes a clear watery sap that sensitizes skin to ultraviolet radiation. Affected areas are subject to severe burns that usually result in blistering and painful dermatitis. Blisters often result in purplish to blackened scars.

Giant hogweed can be controlled each year by cutting off the white flower heads (umbrels) and removing all perennial buds prior to seed development. Care should be taken to ensure that skin does not come into contact with the sap. All removed plant parts must be contained and buried deep in a landfill to prevent re-growth.

Additional Information:
www.al.gov.bc.ca/cropprot/gianthogw ...

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