How do I identify Japanese knotweed?
Japanese knotweed begins to grow in early spring and can grow in any type of soil, no matter how poor.
- It can grow as much as 20 centimetres per day.
- It spreads through rhizome (underground root-like stem) fragments and cut stems.
- It produces clusters of cream flowers towards the end of July.
- It dies back between September and November, leaving brown stems.