pest photo

Robert Vid├ęki, Doronicum Kft.,
Bohemian knotweed
Polygonum x bohemicum

Bohemian knotweed (Polygonum x bohemicum) is an invasive plant. It is a native of Asia and was first detected in Washington in 1986.

This common invasive knotweed is a hybrid between giant and Japanese knotweed and shares characters of both parent species. It was introduced as an ornamental in its own right but has become very widespread. This plantgrows 8 to 12 feet in shrubby clumps and spreads mostly by stem and root fragments. It is usually found in disturbed areas such as flood zones and roadsides.

Map Icon
Survey Maps
Related Pages