Impact: Giant Hogweed is an aggressive competitor. Because of its size and rapid growth, it out-competes native plant species, reducing the amount of suitable habitat available for wildlife. Giant Hogweed dies back during the winter months, leaving bare ground that can lead to an increase in soil erosion on riverbanks and steep slopes.
WARNING: Do not touch! Giant Hogweed contains a substance within its sap that makes the skin sensitive to ultra violet light. This can result in severe burns to the affected areas, producing swelling and severe, painful blistering.
Learn More: Species Profile.
If you have spotted Heracleum mantegazzianum (Giant Hogweed), use this report form to send an email to the appropriate authorities.