17. Eradication of Invasive Plant Species

Themes: Ecology and management; Public engagement


  • Control or eradicate invasive non-native species
  • Increase local knowledge and appreciation of the river

Project description

This project aims to control or ideally eradicate, invasive plant species from the catchment.

Himalayan Balsam is a particular problem within the catchment.  It rapidly becomes dominant over an area, shading out other species.  It dies back completely in winter, leaving banks bare and vulnerable to erosion.

This project aims to coordinate the control of Balsam and other invasive species throughout the catchment, via working parties and landowner engagement. HMWT information leaflets are distributed to riparian landowners each year, ranging from small private gardens to large estates. They are all co-operating and many pull the Balsam themselves. Several volunteer Balsam-pulling sessions were organised in 2015 and will be repeated annually. 




Project lead: Various landowners
Project partners: Herts and Middlesex Wildlife Trust - River Champions, HMWT, local groups, landowners
Funding source: TBC
Project start: Ongoing
Project end: Ongoing
Contact for more information: This email address is being protected from spambots. You need JavaScript enabled to view it.
Volunteers pulling Himalayan balsam

Design by LTD Design Consultants and build by Garganey Consulting.