Building defects database - Dwarf Japanese knotweed

Record details

© Copyright Philip Santo

This is a much smaller version of Japanese knotweed, growing no more than 70-100cm in height on average. Leaves and flowers have some distinct differences from standard Japanese knotweed, with the leaves being darker green and more variable in shape. The leaves have a leathery texture and are usually concave, with crinkled edges curling upwards. Flowers appear late summer in tightly packed upright spikes, and are usually pale pink or white, maturing to a dark pink or red.