Japanese knotweed removal Wales

Specialists in the management, control and removal of invasive plants including Japanese knotweed, Bamboo and Horsetail.


Our Wales team is run by Consultant Technical Lead Ceri Davies, covering the entire country from Anglesey and Snowdonia, through central Wales and the Cardigan coast to South Wales, Cardiff, Newport, Swansea and the borderlands.

"A local service provided by a market-leading national company."

We know invasive plants such as Japanese knotweed and bamboo can cause stress and worry, we’re here to help. With over twenty five years’ experience we can advise you on the best course of action within your budget. Our teams are experienced in carrying out the treatment or removal work with minimal disruption to you.

Japanese knotweed and various invasive plants have become a widespread presence throughout Wales since their introduction in the 19th century, establishing themselves in our gardens, parks, verges, and waterways. The origins of knotweed sightings near Wales’ main ports are believed to be linked to historical shipping and trading practices lacking in biosecurity. In the 19th and 20th centuries, ships returning to the UK from various parts of the world often carried ballast, including soil from foreign ports, which was then discarded to make room for the next cargo.

Among the invasive plants, Japanese knotweed poses the most significant challenge, closely trailed by Bamboo, which has gained popularity in recent years for its screening qualities but can proliferate unchecked. Other problematic species include Horsetail, Giant hogweed, Himalayan balsam, and Cotoneaster.

Knotweed is now prevalent throughout Wales, with notable concentrations in Conwy, Llanelli, Caerphilly, Swansea, and Bridgend.

The unwanted presence of Japanese knotweed has the potential to cause property damage, which means costly repairs, and its potential to spread to neighbouring properties can also cause complex legal issues. It can even lead to a depreciation in home values, making them challenging to sell.

Our team has successfully assisted hundreds of homeowners across the region in addressing issues caused by Japanese knotweed on their properties.

As invasive as Japanese knotweed, Bamboo, with its rhizomes extending 30 feet or more, spreads rapidly, causing new shoots to emerge through lawns and patios. When this encroachment affects neighbouring properties, it can lead to disputes among neighbours, potentially resulting in legal action.

For top-notch invasive plant removal services in Wales, contact Environet today, to connect with our dedicated and highly experienced team. We take pride in being a market-leading specialist company, offering a personalised, local service.

Ceri, with extensive experience working throughout Wales, possesses a wealth of knowledge. He has successfully assisted thousands of homeowners and developers in addressing issues related to these invasive and destructive plants.

Invasive Plant Specialists

Our Services

Japanese knotweed young shoots


Our experts will help you identify Japanese knotweed as well as a variety of other invasive plants

Dan Archer doing some management

Management Plans

Our experienced surveyors will come to your property and create a tailored solution to your invasive plant problem

Machines digging out invasive plant roots on a residential site in Swansea


Cost-effective Japanese knotweed, bamboo and other invasive removal & treatment methods
knotweed leaves


Our teams have the expertise to help you successfully identify the plant that you are dealing with

invasive plant excavation on a commercial site


We help businesses develop land affected by Japanese knotweed, Bamboo and other invasive plants

Samir looking at invasive plant rhizome


With over 25 years’ experience in the knotweed industry, we offer a variety of consultancy services


Knowledge Hub


Japanese Knotweed UK Heatmap

Exposed™: The Japanese Knotweed Heatmap is an interactive online heatmap of Japanese knotweed sightings across the UK.
Mortgage paperwork with some keys and a pen

A Guide to Mortgages and Japanese Knotweed

Understand how the presence of Japanese knotweed could affect your mortgage.
Insurance button on keyboard

Japanese Knotweed Insurance Guide

Making sure you have the right protection against the costs associated with the discovery of Japanese knotweed.
TA6 form on a desk with a laptop

New JustCheck™ – Japanese knotweed protection offers peace of mind to homebuyers and sellers from Japanese knotweed

We’ve launched a new survey, JustCheck™ aimed at homebuyers and sellers who want more certainty on whether or not a property is affected by Japanese knotweed.
A close up of Japanese knotweed in Winter
January 29, 2024
3 minutes read

Everything you need to know about Japanese knotweed dormancy

Plant dormancy is when a plant slows down its activity in response to tough conditions. This helps it save energy and survive challenges like cold weather or lack of water. Different types of dormancy exist, like winter dormancy when trees lose leaves, and summer dormancy when plants in dry areas slow down.
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February 21, 2024
4 minutes read

Blossoming Invaders: Spring’s unwelcome guests on the UK scene 

We will list some of the biggest threats to look out for this Spring and give you some tips on how to identify them.
Blog hero image
February 21, 2024
4 minutes read

Blossoming Invaders: Spring’s unwelcome guests on the UK scene 

A close up of Japanese knotweed in Winter
January 29, 2024
3 minutes read

Everything you need to know about Japanese knotweed dormancy

Giant Hogweed with white flowers
January 11, 2024
5 minutes read

The growing challenge of invasive, non-native plants in the UK

December 23, 2023
1 minute read

Our Founder, Nic Seal reflects on 2023

Photo of a Seminar led by Nic Seal
March 10, 2023
3 minutes read

Webinars and Seminars

Webinar advert
March 21, 2023
1 minute read

‘How does Japanese knotweed affect property sales’

This morning, our Managing Director and Founder, Nic Seal, guest presented a webinar for leading conveyancing body, Searches UK. Nic presented the webinar ‘How does Japanese knotweed affect property sales’ to over 170 registrants.
Webinar advertisement
March 21, 2023
1 minute read

“How to identify invasive plants and understand the risk they present”

Last week, we were thrilled to have one of our directors, Emily Grant, present to an audience of knowledgeable property professionals, including chartered surveyors and property developers, her latest webinar, ‘How to identify invasive plants and understand the risks they present’ which took place, with limited capacity on Tuesday 14th March,10am.

Start fixing your invasive plant problem today by requesting a survey

Rest assured, where invasive species are identified at an early stage and tackled correctly, problems can usually be avoided. Our trained specialists carry out site surveys to map specified terrestrial invasive plant species and provide management plans tailored to your requirements. ​

What our clients say


What our clients say



Our team of experts is available between 9am and 5:30pm, Monday to Friday to answer your enquiries and advise you on the next steps

Want a survey?

Request a survey online in less than two minutes by simply uploading a photograph and providing a few brief details. A member of the team will swiftly come back to you with further information and our availability.

Need quick plant identification?

There’s no need to wait for a survey. Simply upload an image to our identification form and one of our invasive plant experts will take a look and let you know, free of charge.

Contact our team of experts today