Japanese Knotweed Identification
Identifying Japanese Knotweed is done through its large green oval-shaped leaves and bamboo type stem. The plant has different identification characteristics throughout the year:
Japanese Knotweed Identification - SPRING
During March to April the plant sends up new shoots; red-purple in colour with rolled back leaves.
Japanese Knotweed Identification – SUMMER
The plant is a perennial with distinctive branching, hollow, bamboo-like stems covered in purple speckles, often reaching 2-3 metres in height. The leaves of the mature plant are up to 120mm in length with a flattened base and pointed tip and are arranged on arching stems in a zig-zag pattern.
Japanese Knotweed Identification – LATE SUMMER
The plant flowers late in the season, August - October with small creamy white flowers. Although seeds are produced they rarely survive.
Japanese Knotweed Identification – WINTER
During Winter the leaves die back to reveal orange/ brown coloured stems which may stay erect for several years. Stem and leaf material decomposes slowly leaving a deep layer of plant litter.