Giant Hogweed (Heracleum mantegazzianum)

The photo above shows Giant Hogweed on the right in comparison to our native Common Hogweed (Heracleum sphondylium) on the left.

Giant Hogweed facts:

  • Perennial – grows 5-7m.
  • Member of parsley family.
  • Arrived in UK 1893 from Caucasus.
  • Sap causes serious rashes when skin exposed to sunlight. Can cause blindness.
  • Can be controlled by spraying, grazing, cutting or digging- up.
  • Spraying with Glyphosphate (Round Up) is a successful treatment.
  • Spread by rivers and seeds last 3 or more years

For more details on Giant Hogweed, please see here.

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