In 2020 a group of groups agreed to form a group to improve the ecology of the Trym river system. At their second meeting, in March 2021 it was agreed that one of the two projects that would be undertaken would be monitoring water quality of the system and removing all the visible Himalayan Balsam.
The removal of the Himalayan Balsam (balsam) will not be easy. Balsam is an invasive plant and highly successful at colonising river systems. It suppresses native plants. It is an annual capable of growing to 4m in height and propelling its seeds up to 7m. The seeds will successfully travel downstream and colonise new areas each year. The seeds will remain viable for some years if they do not germinate.
To be a success all the balsam in the river system will need to be eliminated and the area monitored continuously thereafter to prevent any rogue plants from recolonising.