How to identify Japanese Knotweed in winter

Japanese Knotweed in winter

It is much harder to spot Japanese Knotweed in winter due to the lack of leaves, and the fact that it looks 'dead'. Many people are mistaken in thinking the problem has gone away due to it 'dying', unfortunately Japanese Knotweed will not just die, it lies dormant in the ground until it grows bigger and stronger next year.

Signs to look for are

  • Straw or light brown coloured Stems
  • Brittle cane like stems
  • Stems will be hollow, resembling bamboo canes
  • Some canes will remain upright but often they collapse into a pile of dry canes from previous years' growth
  • Depending on how mild the winter has been, you may find some shoots of next year’s growth underneath