Size: Can grow up to 2m tall
Native to: Japan, China and Korea
Introduced to the UK: By 1850 a specimen was donated to the Royal Botanic Gardens in Kew by European adventurer Philipp Franz von Siebold.
When To See
Late spring to autumn, flowers produced in late summer
Often grows into dense thickets common in urban areas, such as river banks, railways, roadsides and waste land. It out-competes native flora, and on river banks can contribute to bank erosion and increase the likelihood of flooding.
How To Identify
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Leaves are lush green coloured, shovel or heart shaped, up to 15cm in length, and occur alternately in a zig zag pattern along the stems. Stems, when grown, are bamboo-like canes with purple flecks and regular nodes. Flowers are small cream or white racemes.
How It’s Treated
Most often repeated spraying with approved herbicides over the course several seasons.
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