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Aquatic plants

This section provides links to guidance documents that have been produced by a range of organisations.  While this information should be a useful resource, the Non-native Species Secretariat cannot endorse any guidance. If you would like to recommend management information to include here please contact us.

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Managing aquatic plants

Invasive non-native aquatic plants are a particular problem. They can spread rapidly, choke waterways, increase flooding risk and damage angling interests. Many infestations result from people removing plants that have out-grown their ponds and dumping them in nearby waterways. Below are general resources on non-native aquatic plants:


Azolla filiculoides (water fern)


Crassula helmsii (Australian Swamp-stonecrop)

PLEASE NOTE: the following links have been identified as having outdated information on the use of dichlobenil, which is no longer allowed for use in the UK


Hydrocotyle ranunculoides (floating pennywort)

GB Floating Pennywort Strategy

The following guidance and case studies on floating pennywort management have been developed through the GB Floating Pennywort Strategy, agreed by a national partnership between government and non-government organisations to facilitate local groups engaged in floating management. Find out more and get involved

Other resources


Lagarosiphon major (curly waterweed)


Ludwigia grandiflora (water primrose)


Myriophyllum aquaticum (parrot's feather)