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When will it be seen?

  • You’ll see it most from June to October

What does it look like?

  • Can grow from 1 to 3m tall
  • The leaves will typically be serrated, green and oval-shaped with red veins 
  • The flowers will be bright purple and typically seen from June to September

Watch out for the seeds!

Be mindful of the seeds. They can explode when matured – spreading the seeds far and wide. They can shoot as far as 7m.

Make sure you get an expert to treat this plant to avoid further spreading in future.

We’re proud to have locations in London, Leeds, Birmingham, Liverpool, Hull, Manchester, Bristol, Newcastle & Sheffield.

This means we can help people all over the country tackle any issues with invasive plants. Find your local office from our list of coverage areas.

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Treating invasive weeds all over the UK

Solving your invasive weed problems 

If you’re dealing with an invasive weed problem, don’t do it alone. We’re on hand to help you solve it.

With over 10 years of experience and accreditation with both INNSA and PCA, we’re the experts when it comes to invasive weed treatment.

Looking for information on a different species?

Invasive weeds come in all shapes and sizes. Find out more about the common types of invasive weeds below.


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If left unchecked can cause damage to property, driveways and underground services.

Giant Hogweed

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Seed based species known to cause severe burns when it comes into contact with skin.

Buddleia Davidii

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An eye-catching, attractive plant that’s fast becoming a major issue for the British rail network and property owners.

Himalayan Knotweed

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Lesser known knotweed, but can still cause damage when left unchecked.

Giant Knotweed

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Similar to Japanese knotweed but can grow up to four metres in height.

Alpine Knotweed

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A tall, semi-evergreen perennial growing up to 1.8m in height with large spiky shaped leaves.

Chinese Knotweed

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Used in Chinese medicine for its apparent health benefits, its roots can still cause damage to property and other vegetation.

Bohemian Knotweed

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A new hybrid of Japanese and giant knotweed. This crossbreed is likely to cause major disruption in the years to come.

Case Studies

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