Japanese Knotweed

Polygonum cuspidatum

 Japanese knotweed is often mistakenly planted as an ornamental. Once established it is extremely difficult to remove. Japanese knotweed is a serious threat to Washington waterways. 

Japanese knotweed is often mistakenly planted as an ornamental. Once established it is extremely difficult to remove. Japanese knotweed is a serious threat to Washington waterways. 

 Japanese knotweed flowers late in the summer. 

Japanese knotweed flowers late in the summer. 

Please visit NWBC for more information on this weed.