In summer, Japanese knotweed goes through an exponential growth period with average heights of 2-3 meters being achieved by some plants at their peak. Japanese Knotweed also forms dense clumps of foliage at this time of year, making identification in summer very easy. In late summer, the full bloom of the plant, with little white flowers,  is actually quite attractive. However, its beauty masks its potential destructive force!

To help you identify it, click on the short video above to see typical summer growth. You can also scroll down the page for more summer identification hints and tips.

If you suspect you have Japanese knotweed on your property, contact us online for help and advice or call freephone: 0808 231 9218.

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Tips to help Japanese Knotweed identification in summer

When trying to identify Japanese Knotweed in summer, look out for the following:

  • Plants that are a height of approx 2-3 metres
  • A very dense cluster of stems with a lot of foliage
  • Stems that have a bamboo-like appearance and if broken, are hollow inside
  • Stems that are green with red specks
  • Distinctive spade shaped leafs with a pointed tip and a straightened edge
  • Between August and October, the plant will have its tiny white flowers.

Pictures to help with Japanese knotweed identification in summer

The collection of images below to help with the identification of Japanese Knotweed in summer.

 (click on images above for hi-res version)

For additional images, visit our Google image gallery.

More information on identifying Japanese Knotweed

For more information about how to identify Japanese Knotweed, click on the links below.

Not 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, upload your photos to us directly and we will let you know whether you have knotweed or not.

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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.

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Speak to a Japanese Knotweed expert

If you are unsure whether you have a Japanese knotweed problem it is always best to consult a specialist.

You can contact our Wise Knotweed Solutions team on freephone 0808 231 9218, click to find your local branch or book a survey online using the button bellow.

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