Japanese knotweed is relatively easy to identify, once you know what the characteristics are. These include;
• Asparagus-like spears emerging in spring • Bright green shield shaped leaves that form a zig-zag shape on the stem • Tall green canes, with purple speckles • Clusters of creamy white flowers in late summer • Brown, brittle canes left standing in winter
Take a look at the images below. You can also see loads more Japanese knotweed pictures in our gallery and watch our 3 minute video on How to identify Japanese knotweed. We've also produced a Japanese knotweed Identification Guide, which you can download to help you identify the plant in situ.
Not looking quite right? Check our Japanese knotweed Hybrids and Commonly mistaken plants galleries to be sure.
If you are still unsure, we offer a Japanese knotweed identification service. Email your photos to firstname.lastname@example.org and we'll tell you if Japanese knotweed is present.
This is a free service. However, if you would like to make a small donation to a worthy charity via JustGiving that would be appreciated.