Introduced as a garden plant in the early 19th century Himalayan Balsam, Impatiens glandulifera, was first recorded in the wild in 1855 and is now common throughout the UK.
It has explosive seed heads and the small seeds are easily dispersed by wind or water. It is very invasive, spreads rapidly suppressing native plant growth and it can cause erosion on river banks
Information and Identification Sheets:
Himalayan Balsam SNH Species Action Framework: Invasive non-native plants associated with fresh waters. A Guide to their identification