Giant Knotweed Rhizome is root of popularly known herb Japanese knotweed. Giant knotweed is a banned herb and declared harmful as it grows anywhere and it’s very difficult to get rid of as it has giant roots which can grow in concretes, buildings under any floor etc. However, the dried roots of giant knotweed are used as effective medicine since centuries. This plant is native to Asian countries such as China, and Japan ... Read more