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Invasive plant species

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Invasive non-native plant species can cause substantial environmental damage, cost millions of pounds to tackle annually and reduce biodiversity.

They can be vigorously growing plants which can:

  • out compete native vegetation
  • harbour vermin
  • collect litter
  • obstruct drainage channels or sight lines
  • increase the risk of flooding 
  • increase erosion of the riverbank.

Find out more on how to identify and control the most problematic invasive plant species.

For a copy of the guidance to control Japanese knotweed in construction and landscape contracts, please contact planthealthbiotech@wales.gsi.gov.uk

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Giant hogweed (File size: 3.7MB)
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Himalayan balsam (File size: 3.6MB)
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Japanese Knotweed (File size: 3.6MB)