The plant will appear dead with brown woody canes and telltale zigzag stems. They often have wispy ends where the flowers were. This is because the Japanese Knotweed above the ground dies back and takes its nutrients down to the rhizome (root) system. As a result, the knotweed is ready to produce fresh growth in the spring.
Check our webpage to find out more on identifying japanese knotweed
https://knotweeddoctor.co.uk/japanese-knotweed-identification
