Japanese Knotweed Removal
Covering Cornwall, Devon, Bristol, Somerset & Dorset.
Our CSJK-trained and PCA-qualified surveyors and operatives are experts in the professional removal of Japanese knotweed, ensuring 100% mortgage compliance with trusted and proven treatment methods for Japanese knotweed in the South West.
Japanese Knotweed identification changes throughout the year with the plant changing its visual appearance from spring to winter.
RICS-compliant Japanese knotweed surveys for residential and commercial properties. Residential surveys from £250 +VAT, including all assessments.
Our Japanese Knotweed survey reports are commonly requested by banks and building societies to support mortgage applications.
As every site is unique, our specialist surveyors will visit to assess the site and advise on the most appropriate treatment or removal.
About Us
Southwest Knotweed started in 2011 treating Japanese Knotweed in Cornwall but quickly spread across the Southwest. We provide invasive weed control in Devon, Somerset, Cornwall, Dorset, and Bristol, and we provide bespoke Japanese Knotweed treatment solutions.
Our trained and qualified Japanese Knotweed specialists are always available to discuss the treatment options available for treating and controlling Japanese Knotweed.
Whereas there are numerous providers of Japanese knotweed treatment and prevention throughout the region, Southwest Knotweed offers a full professional service with complete traceability of works carried out. We also advise caution when selecting your contractor, as many do not have the necessary training or qualifications to effectively carry out treatment of Japanese knotweed.
Our Clients
Why Choose Us?
Founded in 2011, our original vision to offer the best professional invasive weed management services to residential and commercial customers still inspires us. We have teams all over the Southwest and operate from Cornwall to Dorset.
We have evolved along with the invasive weed control industry. We have all the systems in place to generate comprehensive survey reports and site visit records, and we are always looking at ways to work smarter so that we can get our results spot on every time. What we really pride ourselves on, though, is our reputation for excellent customer service, expertise, and professionalism.
We are PCA registered and have all the relevant industry associations so that you can be confident that our invasive weed services are the best standard of professional practice available anywhere in the Southwest.
Testimonials
Frequently Asked Questions
Is Japanese Knotweed Poisonous?
No. You can actually eat it. It tastes similar to rhubarb and is starting to appear on trendy restaurant menus!
My neighbour has Knotweed in their garden and I'm afraid of it coming to mine. What can i do?
The landowner has a duty of care to stop it spreading to your property. However, resorting to law is often counter productive in our experience. Best to have a friendly word, pointing out the obvious advantages of having it dealt with. Give them our number and we can advise.
Can the sale of my house fall through because Knotweed is in my garden?
Unfortunately, yes, sometimes even if it is not on your land but on neighbouring land.
Will pulling it out weaken and then kill it like Bindweed?
No, it will make matters worse, as small pieces of rhizome will break off and start new growth. They were doing this for many years at Buckingham Palace and the Knotweed still came back.
I have cut it down; can I compost it?
Please don’t. Composting will not eliminate Japanese Knotweed.
Most people try and then usually end up calling in a specialist. Most botched attempts leave you with deformed plants with no leaf growth that then are even harder to kill. It is an incredibly hard weed to kill. The proper doses of professional product at exactly the right time of year in the right weather conditions and with the proper tools by someone qualified and experienced gets the job done.
Why do you inject the plant?
This is often done in areas of surrounding fragility or, in some cases, where watercourses are situated. We do try to avoid stem injection where possible, due to the uncontrolled nature of the dose rate.
Are the chemicals you use safe?
Yes, to humans and pets, although one is illegal in certain situations and would only be utilised in the proper situation.
How do I know that the treatments have worked?
It is not possible to be 100% sure unless every last centimetre of rhizome is removed and examined, but a good sign is the non-appearance of the plant. Chemicals will not eradicate the plant entirely, although they may render the plant non-apparent. Treated areas that do not now grow back are still deemed contaminated unless full removal has been carried out.
What if it did come back?
We have a warranty available whereby we would re-treat free of charge as many times as necessary. This may be useful if you are selling your property and the new owner needs assurances.
I am sure I have knotweed, but mine doesn't look anything like what I have seen on the web. How can I tell?
There are many types of Knotweed, some have much larger or heart shaped leaves, some are smaller, almost bonsai. We can come and view for you or just send us a photo.
What is the cost of treating Knotweed?
Each situation is unique, but we will give you a firm competitive quote within a few days of the site survey.