Japanese knotweed is native to Japan and considered to be a highly invasive species.
Therefore it is essential to identify and attack this weed early to ensure it does not cause horrendous damage and spread rapidly.
The plant has distinctive rhizomes or roots, which are underground structures that resemble roots, and these can be more extensive than the above-ground portion of the plant.
In spring, reddish-purple fleshy shoots will emerge from crimson-pink buds at ground level.
These can grow to reach more than seven feet (2.1m) tall and the canes will have characteristic purple flecks and will produce branches from nodes along the length.