Giant Hogweed (Heracleum mantegazzianum) poses a serious threat to human health and the environment. The clear sap found in its stem and hairs can result in severe burns and blistering. If sap enters the eyes, it can cause temporary or permanent blindness.
View the Metro Vancouver Best Management Practices for Giant Hogweed (PDF)
- Very tall, reaching up to 5 metres.
- Leaves are shiny and large with coarse, jagged edges.
- Stalks have purple spots or streaks and stiff bristly hairs.
- Typically grows on riverbanks, ravines, vacant lots or along roads.
- White flower heads reach up to 1.5 metres in diameter, bloom in mid August.
Removal & Disposal
If you find Giant Hogweed on your property, it needs to be removed as per the City’s Noxious Weed Bylaw Number 4181, 2010.
If you are exposed to Giant Hogweed, wash the affected area immediately, keep it out of the sun and seek medical advice.
It is best to let a professional remove this plant.
For more information, visit Work Safe British Columbia’s safety bulletin and video.
Report Giant Hogweed Sightings in Coquitlam
Please report Giant Hogweed in Coquitlam, by using the online Hogweed Reporting Form or by contacting Parks Customer Service.