Japanese Knotweed in May

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Japanese knotweed goes through some interesting changes around May, and the short video above shows you exactly what the invasive weed looks like in late spring.

At this stage, when the sun has been out in force, Japanese knotweed will be growing rapidly and in some cases up to 10cm a day!

If you suspect you have Japanese knotweed on your property you can click the button below to get in touch with the experts at Wise Knotweed Solutions today. If you want to learn more identifying Japanese knotweed continue to scroll down his page for more help and advice.

Contact Wise Knotweed Solutions

Tips to help Identify knotweed in May

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

  • New shoots that are red/purple in colour
  • Canes that appear to be growing quickly
  • Leaves unrolling as the plant turns green.
  • Leaves with a distinctive zigzag pattern on the stems
  • Canes reaching heights of up to 3m
  • Bamboo like canes that are hollow and have a characteristic pattern of purple speckles.

Other links to help identify Japanese knotweed

Click on the links below to help you identify Japanese knotweed throughout the year:

Identify Japanese knotweed in Spring

Initially taking the form of an asparagus like spear, knotweed shoots will rapidly grow through the spring. Click on the link below to learn more about identifying Japanese Knotweed in spring

Identify knotweed in spring

Identify Japanese knotweed in Summer

Summer sees exponential knotweed growth. Bamboo like stems and a dense foliage will form. Click the link below to find out how to identify Japanese Knotweed in summer.

Identify Japanese knotweed in summer

Identify Japanese knotweed in Autumn

Knotweed stems will start turning brown and leafs will begin to wilt and turn yellow. Click on the link below for further information on identifying Japanese Knotweed in autumn.

Identify Japanese knotweed in autumn

Identify Japanese knotweed in Winter

Knotweed foliage will now be completely gone and the canes will die off. Click on the link below to understand how to identify knotweed that is preparing to grow again the following spring.

Identify Japanese knotweed in winter

Identify the Japanese knotweed Rhizome

The knotweed rhizome system can be found at depths of around 2m below the plant. It may also extend 7m laterally from a parent plant. Click on the link below to learn how to identify it.

Identify the Japanese Knotweed rhizome

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.

Wise knotweed service

Free knotweed assesment

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 you photos

Talk to a Japanese knotweed expert

If you have a problem with Japanese knotweed then call our fully trained and qualified team today on freephone 0808 231 9218 or find your local branch. 

Alternatively, you can click the button below to book a Japanese knotweed survey for your property

Book a Japanese knotweed survey

Why Choose Wise Knotweed Solutions

  • Full reports within 72 hours

  • Real and meaningful guarantees

  • Transparent & itemised costs

  • Instant Onsite Diagnosis & Estimates

  • Rated and trusted

  • PCA Award winners

Contact Wise Knotweed Solutions

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