Knowledge Hub

Whether you’re a homeowner, a property professional or work in construction, our Knowledge Hub contains everything you need to know about invasive plants, all in one handy location

Some useful information to explore



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.

read our latest news


May 9, 2023
1 minute read

Celebrating 5 years of PCA membership

Environet is proud to be a fully-fledged member of the industry trade body, The Property Care Association (PCA), and this week we celebrate our 5-year membership anniversary.
Close up on bamboo leaves
May 4, 2023
2 minutes read

Bamboo encroachment causes problems for Cheshire homeowner

At first, Isobel Chetwood wasn’t aware that bamboo had been planted by the tenants in her neighbour’s garden, along the boundary with her property in Knutsford, Cheshire.
picture showing Environet's updated website and rebrand
April 11, 2023
2 minutes read

Our new website is live!

We hope you like our new and improved website, which reflects our growth over the last twenty-five years, in which time we’ve expanded our focus beyond Japanese knotweed alone, and as such have become a leading specialist in the treatment and removal of all kinds of invasive plants.
Japanese knotweed ready to cook
April 4, 2023
2 minutes read

Is Japanese knotweed safe to eat?

Foraging, the gathering of wild food for free from its natural habitat, was once the domain of upmarket chefs, but since the pandemic it’s hit the mainstream
Picture of Japanese Knotweed
January 23, 2018
3 minutes read

What’s the best Japanese knotweed disposal solution?

Japanese knotweed growing through a cavity wall
January 13, 2015
2 minutes read

Japanese knotweed – Environet review 2014

So what did we achieve in the battle against Japanese knotweed in 2014? When I look back, quite a lot. On the general awareness front we launched our new website, on which we have received extremely favourable feedback. 

Japanese knotweed canes in the winter
December 13, 2016
1 minute read

Building Engineer: Japanese Knotweed – Winter Treatment

Japanese knotweed canes in the winter
December 23, 2016
2 minutes read

Environet’s reflection on 2016

educational training

Webinars and seminars

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.

expert research


There’s a lot of misleading information about Japanese knotweed, and other invasive plants, so we thought we’d share our knowledge and expertise. Our articles are designed to provide impartial honest information, written by experts, to make you better informed.

TA6 form on a desk with a laptop and cup of coffee
March 7, 2023
1 minute read

The TA6 Form:Understanding and mitigating knotweed risk

The Law Society’s amendment to the Explanatory Notes accompanying the TA6 conveyancing form changed in 2020. In order for a seller to tick “No” to the Japanese knotweed question, they must be certain that no rhizome (root) is present in the ground of the property, or within 3 metres of the boundary, even if there are no visible signs above ground.
Invasive plant out of control growth
January 10, 2023
1 minute read

The invasive plants posing the greatest threat to property

When it comes to property, certain invasive plants are more problematic than others. We highlight the main ones to watch out for, the risks they can pose and explain how best to treat them.
Brownfield development site
October 22, 2022
1 minute read

Land Remediation Tax Relief can generate significant savings for developers of brownfield sites contaminated with Japanese knotweed. We explain how.

Introduced in 2001, Land Remediation Tax Relief (LRTR) is designed to encourage the redevelopment of more challenging brownfield sites by assisting developers with the cost of dealing with contamination such as asbestos, radon and – since 2009 - Japanese knotweed.
Digger being operated on land due to be developed
July 1, 2022
1 minute read

Legal cases against developers are on the rise – we explain how best to mitigate the risks.

Reluctance to confront the possibility that Japanese knotweed could be present on residential development sites is putting developers at risk of expensive litigation if the invasive plant emerges post-sale.

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. ​


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