Japanese Knotweed Identification
Key Features of Japanese Knotweed
Japanese Knotweed identification is not difficult in the blooming season that typically lasts from late summer to middle autumn. Main features to identify the plant correctly in this time of the year include the following:
- The large plant typically 2-3 m (6-10 ft) tall.
- Distinct upright, semi-woody, hollow stems with nodes like bamboo, with diameter up to 4 cm (1.6 in). The stems are pale-green, often with red or purple speckles in late spring to mid-autumn.
- Hollow branches of zig-zag shape holding the leaves. Leaves sit alternatively on the opposite sides of the branch.
- Leaves and side shoots grow from nodes.
- Leaves are heart-shaped, with flat bases, up to 10-15 cm (3.9-5.8 in) long.
- Flowers are creamy-white coloured and are arranged in clusters of 8-12 cm (3.2-4.7 in) long.
Still not sure if Japanese Knotweed is present on your land or neighbouring area?
Watch our high-quality photographs that will help you identify Japanese Knotweed.
Free Japanese Knotweed Identification
Our team is trained to a very high standard in Japanese Knotweed identification at any time of year. Please send us photos of suspicious plants you are concerned with using our Enquiry Form below. If possible, our specialists will identify Japanese Knotweed on yours photographs for FREE. However, photographic pictures not always provide 100% evidence of the presence of knotweed. If we can not identify plant using your photos please book a survey of your site.