Ben Lindley, Company Director at Japanese Knotweed Ltd. Last reviewed on 12th June 2026.
Can different methods be used to remove knotweed?
In this article you’ll discover when it comes to Japanese knotweed on property or commercial land, there is no one-size-fits-all solution – and the reasons behind that being true. We look at why every property and every site is different, and whether a combination of treatment methods can be as effective as a single method to achieve long-term control and removal.
Are combined treatments for Japanese knotweed as effective as a single method?
It really depends on the needs of the client and the site.
The main methods are:
- Herbicide application programme
- Excavation and removal
A single treatment (or method) option is most often requested – client’s are either happy for a longer-term approach and opt for a herbicide programme, or need it gone as soon as possible and opt for excavation. For instance a site bought to be developed will often need all knotweed removed (or reloacted if suitable), and excavation will be the ideal solution.
A combination of treatments (or methods) may include herbicide treatment, excavation, root barrier installation, and usually any option will involve ongoing monitoring. By selecting the right mix of techniques, we create a bespoke solution tailored to your site’s specific requirements, budget, and timescales.
more on herbicide vs excavation
Benefits for Homeowners
For residential properties, combined treatments can offer a practical and cost-effective route to managing knotweed while protecting your property’s value. Where complete excavation may not be necessary (or desired), herbicide treatment will deplete the plant’s viability and therefore reduce the infestation over time, while targeted excavation can be used to address problem areas quickly. Homeowners often ask is a digger can be easily used in rear gardens and in places where access is difficult we may spray the knotweed instead.
This combined approach gives the homeowner peace of mind that either way the knotweed is under control. Herbcide application in itself comes with multiple options – it can be sprayed on the plant (usually both upper and lower sides of the leaves), injected into the stems using a special gun, or wiped onto the leaves. These options safeguard surrounding plants that need to be non-targetted during chemical application.
A tailored treatment plan can help homeowners:
- Be tailored to each property and factor in considerations such as access, other plants, planned changes such as buiulding works.
- Minimise disruption to gardens and outdoor spaces.
- Achieve long-term control with professional monitoring and guarantees where required.
Benefits for Commercial Businesses
For commercial landowners and asset managers, combined treatments can be designed to minimise operational disruption while ensuring compliance and effective risk management. Depending on the site and all factors required for consideration, such as access, public and environmental concerns, different options can suit the short and long term goals for knotweed removal. Some areas with low footfall for instance may be best suited to excavation whereas other areaas with consistent public access (car parks for instance) may be better suited for a herbcide programme.
Benefits include:
- Managing and reducing health and safety risks associated with unmanaged infestations.
- Protecting infrastructure and built assets from invasive growth.
- Maintaining business operations during treatment works.
- Demonstrating proactive environmental and land management practices.
- Protecting the public.
Benefits for Construction and Developers
Developers often face tight project programmes and complex site constraints. A combined approach allows treatment methods to be aligned with construction schedules, enabling development to proceed efficiently while managing knotweed risks. Options may include onsite relocation and burial using a root barrier to prevent future growth.
Benefits include:
- Supporting planning and development objectives.
- Reducing delays to construction programmes.
- Providing cost-effective remediation tailored to site conditions.
- Ensuring compliance with environmental legislation and waste management requirements.
- Delivering a clear, auditable management strategy for stakeholders and future landowners.
CLIENT TESTIMONIAL: “I have nothing but positive things to say about Japanese Knotweed Ltd. A very easy to contact company with quick, helpful responses. Work is carried out exactly as you would expect and at a reasonable fee.” Dandara Ltd
A bespoke solution for every site
Our experienced team works closely with homeowners, businesses, and developers to assess each site and recommend the most effective combination of treatments. By taking a tailored approach, we can balance effectiveness, environmental considerations, project timescales, and budget to deliver the best possible outcome for your Japanese knotweed challenge.
Not sure which knotweed treatment is right for your site? Contact our team for a professional assessment and a bespoke treatment plan tailored to your property, project requirements, and budget.