Japanese Knotweed in Stockport, Greater Manchester and Surrounding Areas

S4JK are invasive weed management experts based in Manchester, England. Our team comprises fully certified surveyors, qualified to spray Japanese Knotweed with herbicide, as well as stem injecting.

We offer 10 year warranties approved by the PCA, Insurance Backed Guarantees (IBGs) and also our "Same Day Service", when necessary.



During this COVID-19 pandemic we are now fully operational and want to reassure any prospective customers that Japanese Knotweed is one less thing you have to worry about. We are closely following all government guidelines and social distancing rules. Since we use chemicals for our treatments, we have full PPE to safeguard ourselves and clients (we have also distributed any excess PPE to local care providers). We are available for on-site visits or can carry out inspections via video calls/photographs.

Staying Covid 19 secure

We confirm that we have complied with the governments guidance on managing  the risk of COVID 19.

We have carried out a COVID 19 risk assessment and shared the results with the people who work here.

We have implemented all the measures possible to make working safe for both our workers and clients.

Eradicating Japanese Knotweed

Japanese Knotweed is an invasive species of plant that is active all year round. The plant hibernates in winter making you think your problem has disappeared when in reality the real problem lies under the ground. The plant works off an underground root system called a Rhizome. This Rhizome can spread far further than what you can see above ground, making it a really pesky plant to get rid of.

Here at S4JK we are heavily invested in making sure our staff are up to date with all current legislation and PCA guidance. We are members of the Invasive Weed Control Group that keeps us up to date with all the latest research and methodology within our industry. We also invest in our staff in various courses concerning eradication to make sure our methods are the best on the market.

Harsh consequences of Knotweed invasion

This nightmare plant can cause damage to buildings, hard standings and other structures. Banks are reluctant to lend on properties where Japanese Knotweed has been to left to cause havoc, however most mortgage lenders WILL lend if a proper management plan is in place from a professional company like ourselves.

Japanese Knotweed causes problems and hold ups with mortgages, re-mortgages and planning permission. Problems can also be caused by spreading onto neighbouring properties, which can inflict serious legal implications. We continually help people with these problems with our expert knowledge of invasive plants and current legislation. We act fast on your problems and take the stress away. We will find the best suitable option for you at a great price.

We offer services such as:

  • 5 year management and treatment plans for Japanese Knotweed with optional Insurance Backed Guarantees (IBG)
  • 10 Year PCA Approved Guarantees included in our management plans
  • Management and treatment plans for other invasive non-native species
  • Expert report writing services
  • Advice/identification
  • Commercial and residential Japanese Knotweed removal/eradication
  • Site surveys (site surveys are free when we have confirmed Japanese Knotweed through photo identification)

Proper care and attention need taking when removing Japanese Knotweed, so don't try to deal with eradication yourself. Get a well-trained professional to handle it for you. Our team will provide a free site visit to identify if you have an invasive weed problem and then explain the best course of treatment and costs involved. If you’re happy with everything, our dedicated team will take care of the rest, from the removal of the invasive plant, to aftercare and maintenance. We also deal with other types of invasive species, including Giant Hogweed, Himalayan Balsam and Buddleja.

If you're struggling to deal with the devastating effects of this invasive species of plant, simply get in touch with our removal team, and we will help liberate your garden.

About S4JK >>

Find out more...

Japanese Knotweed solutions for residential properties
Japanese Knotweed solutions for commercial properties
Japanese Knotweed report writing
Japanese Knotweed case studies