Himalayan Balsam (aka Policemans helmet)

Impatiens glandulifera

Description:
Himalayan Balsam
Facts:

Introduced as a garden plant in the middle of the 19th century this species is now a common sight on riverbanks throughout the UK. It has an explosive seed head that projects its seed for some distance and is difficult to remove successfully. Its rapid growth which can reach almost two metres shades out many native species.

Introduced:

Mid 1800's
Origin:
Himalayas
Location:
Widespread in UK particularly on banks of watercourses.
Status:
Spreading
Problems:
Comments:
Crowds out and outcompetes native plants.