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Something about Japanese knotweed that often catches property owners unawares it how fast it grows in the early stages of spring. Very quickly, Japanese knotweed stems can grow from small shoots that look like asparagus spears to 10 feet (3 metres) in height.
Week-to-week, month-to-month, the growth can look very different. This is why Japanese knotweed identification in spring can be tricky, to sum up in a few sentences. Watch the video above and review the tips below to help you spot knotweed near you.
Alternatively, contact us online for help or call freephone 0808 231 9218 to speak to one of our Japanese knotweed experts who can arrange a Japanese knotweed survey and, eventually, a removal & treatment programme to help eradicate the problem.
Tips to help Japanese knotweed identification in spring
When trying to identify Japanese Knotweed in spring, look out for the following:
- New shoots that are red/purple in colour
- In early spring, knotweed shoots begin to look like thick asparagus spears
- Fast growing canes with leaves that begin to unroll as the plant turns green.
- In late spring, canes can reach 3 metres (10 feet) in height.
- Bamboo like canes that are hollow and have a characteristic pattern of purple speckles.
- Leaves with a distinctive zigzag pattern on the stems
Photos to help with Japanese knotweed identification in spring
Take a look at the collection of images below to help identify Japanese Knotweed in spring.
Early shoots
Spring has sprung
Knotweed leaves
Knotweed canes
Knotweed shoots
New growth close up
Asparagus like spears
Knotweed damage
(click on images above for hi-res version)
For additional images, visit our Google Image Galley.
identifying Japanese knotweed throughout the year
For more information on how to identify Japanese Knotweed, click on the links below.
Japanese Knotweed in May
May is usually a key month in the development of Japanese knotweed. The weather getting warmer can spark exponential growth.
Japanese knotweed in MayIdentify Japanese knotweed in Summer
Learn more about how to identify Japanese knotweed within the summer months.
Identify Japanese knotweed in summerIdentify Japanese knotweed in Autumn
Click to view a short video with tips and advice on how to identify Japanese knotweed in Autumn.
Identify Japanese knotweed in autumnIdentify Japanese knotweed in Winter
View our short video to learn what to look out for when trying to identify a Japanese knotweed issue in winter.
Identify Japanese knotweed in winterNot sure if you have knotweed?
If you have a suspicious looking plant growing on or near your property and want to know whether it is knotweed then upload your photos to us directly and we will let you know whether you have knotweed or not.
Free knotweed assessment
Have you seen a suspicious plant and want to know if it is the dreaded Japanese knotweed? Simply click the button below to upload your photos and we will get back to you with an answer.
Upload photosSpeak to a Japanese Knotweed expert
If you are still unsure if you have a Japanese knotweed issue, it is always best to consult a specialist.
You can contact our Wise Knotweed Solutions team on freephone: 0808 231 9218. You can also book a survey online and one of our Japanese knotweed experts will be in touch promptly.
Book a Japanese knotweed survey
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