Giant Alien
Giant Hogweed (Heracleum mantegazzianum) a pernicious invasive weed: Developing a sustainable strategy for alien invasive plant management in Europe

Manual
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About the manual
Identification of the plant
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Identification of the plant
Giant Hogweed is a common name for a group of closely related tall species of the genus Heracleum that have been introduced to Europe. They are among the largest herbs in Europe and with their impressive appearance and dominant colonies, the plants are familiar to river authorities and land managers in most central and northern European countries.

In order to avoid controlling native species that can look similar to tall invasive hogweeds, it is important to be able to distinguish between them. Certain species, mainly of the Apiaceae family, are occasionally mistaken for Giant Hogweed or other tall hogweeds but the former are not usually invasive and therefore, should not be controlled.

Features of tall invasive hogweed species and other species that can be mistaken for invasive hogweeds are summarized in the Identification section of the manual. More details of the key characters for each species can be found here
Giant Alien Project (2002-2005) has been financed by the European Commision within the 5th Framework Programme, Energy, Environment and Sustainable Development’, project no. EVK2-CT-2001-00128