Residential Japanese knotweed removal methods

Cost-effective Japanese knotweed removal & treatment methods for residential sites with insurance backed guarantees

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What our clients say

What our clients say


The tried and tested DART™ method (Dual Action Residential Treatment) from Environet is the most cost-effective combination removal & treatment solution for Japanese knotweed on residential properties.


Environet has developed DART™, a method that combines root/rhizome removal with herbicide treatment. By removing the bulk of the crowns and rhizome system we massively reduce the plant’s vigour and stimulate growth of any small pieces of remaining rhizome that are then killed with effective herbicide treatment in the summer months. Less expensive than full excavation and quicker than herbicide, it gives you the best of both worlds.


DART™ can be carried out at any time of year, but the root/rhizome removal element is best carried out in the winter months, usually taking just a few days. The added benefit being that disruption does not occur in Spring, Summer or Autumn when you most want to enjoy your garden. The follow-up herbicide visits have minimal impact on you and your garden.


DART™ is offered with our insurance backed guarantee underwritten by an “AA-” rated insurer for up to 10 years. Should regrowth be experienced, further treatment is carried out at no extra cost.

DART excavation next to house

Check for Japanese knotweed hotspots in your area

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With Environet’s unique Resi-Dig-Out™ method a property can be knotweed free in a matter of days at any time of year.

Where future works that involve disturbing the ground e.g. extensions or landscaping are planned, Resi-Dig-Out™ is the recommended method.

The Environet Resi-Dig-Out™ method has been developed for residential properties from our patented Xtract™ method. Knotweed infested soil is excavated and the viable rhizome is separated from the soil. The rhizome is removed from the property in accordance with Environmental Protection Act 1990 requirements and the excavated soil is back-filled into the hole.

It can be completed in a matter of days, at any time of the year and is much cheaper than Dig & Dump.


Resi-Dig-Out™ is proving to be the only realistic option where previous botched attempts have been made. Where rhizome dormancy has been induced, it’s not possible to successfully kill the rhizome system with herbicide, as it doesn’t have a sizeable leaf area. Physical removal is therefore the only practical option, unless you are prepared for the knotweed to be treated for many years.

Resi-Dig-Outs™ are offered with our insurance backed guarantee underwritten by an “AA-” rated insurer for up to 10 years. Should regrowth be experienced, further treatment would be carried out under the guarantee at no extra cost

Use our extensive guide to identify Japanese knotweed

What does Japanese knotweed look like?

Japanese knotweed herbicide treatment

Herbicide treatment is a popular control method because it has the advantage of being relatively low cost, and is effective if done correctly.

Herbicide treatment
Japanese knotweed management plant

Residential surveys and Japanese knotweed management plans (JKMP)

Detailing the risks and how to overcome them with effective treatment or removal solutions – with guarantees.

We have robust systems in place for Environmental and Health & Safety management. Risk assessments are carried out for every aspect of our business to identify situations where harm could be caused. We have an ethos of continuous improvement to eliminate or reduce the risks with detailed working procedures, on-going training and monitoring.

All our staff have health and safety and emergency first aid training. We are also accredited by CHAS and Constructionline and are members of the Property Care Association (PCA).


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?

If you already know you have an invasive plant problem, you can request a survey online in less than two minutes by 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?

Simply upload a few images of your problem plant to our identification form and one of our invasive plant experts will take a look and let you know, free of charge what you are dealing with. We’ll also be there to help with next steps where necessary. 

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