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Giant Hogweed, Heracleum mantegazzianum


Short description of Heracleum mantegazzianum, Giant Hogweed

Aptly named ‘giant’, this umbellifer (member of the cow-parsley family) has flowering stems typically 2-3 m high bearing umbels of flowers up to 80 cm in diameter. The basal leaves are often 1 m or more in size.

Description of Heracleum mantegazzianum, Giant Hogweed status in GB

Giant hogweed is widespread in lowland GB, and is invasive by lowland rivers and on waste land.

Habitat summary: Heracleum mantegazzianum, Giant Hogweed

It is especially abundant by lowland streams and rivers, but also occurs widely on waste ground and in rough pastures. It grows on moist fertile soils, achieving its greatest stature in partial shade. In more open grassland, flowering may be delayed by repeated grazing.

Overview table

Environment: Terrestrial
Species status: Non-Native
Native range: Azerbaijan, Gruziya
Functional type: Land plant
Status in England: Non-Native
Status in Scotland: Non-Native
Status in Wales: Non-Native
Location of first record: v.c.29 (Shelford)
Date of first record: 1828

Distribution map

GB Distribution from BSBI

Author's name:

Mark Hill, J. Pergl and I. Perglova

Last updated:

October 2nd 2019

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Thin strip of image show tree trunk and bark