Helping landowners and developers with Japanese knotweed problems
Managing japanese knotweed on development sites, helping you identify the scale of the problem and providing optimum solutions to suit your time and budgetary constraints.
Top 6 problems experienced by landowners and developers of infested land
- Cost of remediation (Get a quick quote)

- Time taken to clear a site of Japanese knotweed
- Delays to construction caused by Japanese knotweed
- Damage caused by Japanese knotweed to development, property, drains and hard surfaces
- Encroachment of Japanese knotweed to or from adjoining sites and risk of civil action
- Ensuring full compliance with legislation designed to prevent the off site spread of Japanese knotweed
Download in PDF our publication "Japanese Knotweed - A Guide for Landowners and Developers"
See also our article "The Legal, Technical and Financial Problems associated with developing a site without having first achieved complete eradication of Japanese Knotweed"
Solving your Japanese knotweed problem
We have a simple 3 step approach.... our flow chart may assist! Click here to make our flow chart readable in a new window..aspx?width=250&height=353)
1. Diagnosis
Determining the extent and scale of your knotweed problem
If you suspect you have Japanese knotweed but aren’t 100% certain either view our Japanese knotweed picture library or if you prefer email your own photos to us and we’ll confirm it one way or the other.
We provide Japanese knotweed development and construction site surveys for correct identification of Japanese knotweed and hybrid varieties, quantifying extent of infested soil, identifying site specific constraints affecting treatment options, site liabilities and establishing customer’s requirements, timeframe and budget.
We are happy to prepare either budgetary or detailed proposals detailing treatment options for eradication or control of Japanese knotweed, including all relevant cost and contract information.
2. Remedy
On site treatment of Japanese knotweed to take the problem off your hands
We have an armoury of treatment methods designed to suit almost all situations tailored specifically to site conditions and customer requirements, in terms of budget and timeframe.
Our most popular method for the quick eco-friendly way of completely eradicating Japanese knotweed from development sites is Xtract™
If Xtract™ does not suit other options exist. We’ve produced a simple flow chart showing Japanese knotweed treatment options to help you determine what method might be best in your circumstances.
Alternatively speak direct to one of our experts now who can discuss the best options with you.
3. Monitoring/Guarantee
Supporting you for years after completion of the Japanese knotweed treatment
Reassurance that where guarantees are provided for Japanese Knotweed eradication you have the backing and continued support of Environet®, a financially secure, well established and trusted company specialising solely in the eradication of Japanese knotweed from development and construction sites.