Specialist control services

Getting rid of Japanese knotweed in Cardiff

Japanese Knotweed Ltd have been helping Cardiff residents and businesses treat and remove knotweed infestation since 2010. We are Cardiff’s trusted Japanese knotweed removal experts with over 10,000 satisfied customers and over 1,000 independent five-star reviews on Trustpilot.

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Controlling Cardiff’s Japanese Knotweed

Cardiff has become one of the major hotspots for Japanese knotweed infestation. Japanese knotweed is becoming an increasingly common problem for residents and businesses with a growing number of encroachment cases where knotweed spreads from neighbouring properties. Japanese Knotweed Ltd’s specialist services help people in Cardiff to control and remove knotweed for good.


Excavation is the option for Cardiff residents and business that want to remove Japanese knotweed for good. The only way to get rid of Japanese knotweed once and for all is to remove the contaminated ground.

Japanese knotweed is a highly resilient invasive species of weed that is capable of growing new shoots from its root network. These special roots are known as rhizomes, and even a tiny piece as small as 0.5g is capable of allowing the infestation to regrow. With root systems that bury deep into the ground, excavation of the contaminated soil is the best way to completely remove the infestation.

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Excavator working on clearing a site

Cardiff’s Knotweed treatment plans

A popular option in Cardiff – especially within smaller spaces is Chemical Treatment (herbicide). The goal of herbicides is to control its growth and stop the spread. Japanese knotweed treatment will exhaust the plant’s ability to grow and will force it into a dormant state .

Over the course of the plan, the treatment programme will prevent the plant producing aerial growth and additionally, prevent the rhizomes from growing further. If the knotweed area is likely to be disturbed physical removal of the knotweed may be required instead.

Treatment methods include stem injection, herbicide spray and leaf wiping. Our herbicide programmes are packaged within a  Knotweed Management Plan (KMP), which comes with an Insurance Backed Guarantee.

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The average cost to remove Japanese knotweed in Cardiff varies, depending on the methods involved and the size of the affected areas. If it is identified and dealt with promptly, the costs of removing Japanese knotweed can be kept to a minimum. Long-term herbicide treatment is usually the most cost-effective control method. Our professionally delivered herbicide treatment programme will provide successful chemical control of Japanese knotweed within a period of 3-7 years.

Excavation of Japanese knotweed costs more than herbicide treatment due to labour, materials, waste removal and reinstatement costs. However, it ensures complete Japanese knotweed removal allowing free use or development of the property. We provide cost-efficient excavation due to our extensive experience whilst minimising waste volumes.

Following our professional surveys we will provide you with a no-nonsense, comprehensive report with no-obligation recommendations and quotes.

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Japanese knotweed leaves close up

do not attempt to diy JAPANESE KNOTWEED removal

There are lots of theories on the internet and in local Cardiff communities about how to remove Japanese knotweed – from using a lawnmower to using a flamethrower. The truth is that there is no way to deal with Japanese knotweed yourself. You need to have a plan in place to control the Japanese knotweed, or you need to excavate it to get rid of it once-and-for-all.

As knotweed is an invasive species that is classed as “Controlled Waste” it can only be removed by licenced organisations. It must be disposed of safely at a licenced landfill site by a registered waste carrier. Carelessly disposed of, knotweed can cause an infestation. Due to this, and the legal issues surrounding knotweed, we do not advise you try to undertake this operation yourself. Contact us instead.

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your local JAPANESE KNOTWEED specialists

Japanese Knotweed Ltd have been operating in Cardiff and the surrounding areas since 2010 and we have established some really strong ties to local business and communities. We have highly trained and accredited surveyors and technicians carrying out treatment plans and excavations for hundreds of satisfied customers all throughout the Cardiff area, and we would be thrilled to have your business.

Fill in the contact form to enquire about our services, and one of the team will get in touch.

We are members of the Property Care Association and have a proven track record working successfully for local councils, developers, construction companies and private landowners. If you are selling or buying a property that is affected by Japanese knotweed, request your free* Japanese knotweed Survey.

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Cardiff Knotweed Removal Services

Removing Japanese knotweed in Cardiff starts with a survey. Book your professional survey with us today.

Why choose us

  • With hundreds of satisfied customers in Cardiff and over 1,000 five-star reviews on Trustpilot, we’re the UK’s trusted Japanese knotweed experts
  • We work closely with you to tailor a site-specific package, often utilising several treatment techniques on a single site
  • We work to the PCA Code of Practice means we can provide you with an Insurance backed Guarantee
A stem of Japanese knotweed leaves

Our top clients

The benefits of choosing Japanese Knotweed Ltd

Individuals and businesses of all sizes come to us to provide a complete control solution that has been carefully and professionally thought out, and has considered every aspect – environmental impact, project delivery and cost.

We are a company with the right industry standards and certification. As well as holding all safety accreditations, we are members of BASIS and the Amenity Standard. The BASIS Amenity Assured Scheme sets a benchmark of best proactive methods for weed, pest and disease controls in Amenity situations.

You’ll benefit from our Specialist Advisory Services, from qualified experts with over 25 years’ experience in agronomy and amenity weed management.

Our operations are carried out in accordance with The Wildlife and Countryside Act 1981, The Environmental Protection Act 1990, EPA (Duty of Care) Regulations 1991 and all other relevant legislation, as well as the PCA, INNSA and E.A. Code of Practice guidelines.



Our friendly team can help with any suspected knotweed issues.