Japanese Knotweed are spreading and taking over back gardens all over Dublin.

Himalayan Balsam, river dodder, Invasive species

Japanese Knotweed on both sides of river Dodder in South Dublin.

Picture of Japanese Knotweed plant in flower

Knotweed is spreading along river Dodder

This stand of Japanese Knotweed measures approx 10 x 10 m (2014)

Knotweed flowering can start from late August onwards, plants usually start to die back in Ireland from late October

Himalayan Balsam and Japanese Knotweed growing side by side along river Dodder

Bumble Bee feeding on Himalayan Balsam beside river Dodder

Difference between Japanese and Hybrid Knotweed plants