About Us

Japanese Knotweed Expert

At Japanese Knotweed Expert Limited we have been eradicating Japanese knotweed for over 18 years. As such, we have the experience to deal with any breakout of this invasive weed. We are so confident in our service that we offer a 10-year guarantee on all of the work that we carry out. We also provide 10 Year Insurance Backed Guarantee with all Management plans we implement.

We are based in the West Midlands, however, we cover the whole of the UK, helping our clients to remediate Japanese knotweed and other invasive weeds. At our head office in Stoke on Trent, we have a dedicated office team who are on hand to assist our clients with queries, as well as offer advice to property developers, builders, estate agents and architects.

Honesty is an integral part of our company ethos…

We have approximately 20% of our clients that say they have Japanese knotweed and then it turns out to be something quite different. We can complete a site visit to give you quick and accurate identification of your invasive weed. If you need a survey completing on your property, we can provide the necessary documentation that you need to provide to a mortgage company or surveyor. Please click here if you would like to find out more.

What can we do for you?

We are able to provide a variety of different treatment methods to suit each different site and client. If you own a residential property, we can implement a herbicide treatment or alternatively if you are a developer, we can excavate the site to allow you to continue with your developments plans without delay. We can provide:

Free Identification – We can visit the site and give you correct identification of the suspicious weed within 48 hours.

Japanese Knotweed Site Surveys – We can complete detailed surveys which can be provided to a mortgage company.

Japanese Knotweed Management Plan – This includes detailed descriptions of all of the treatment methods we offer and also the most suitable for your case of Japanese Knotweed. This also includes a treatment schedule and breakdown of the costs involved.

Company 10-year guarantee - We offer a company guarantee which ensures that you are 100% happy with any work we complete.

10-year Insurance Backed Guarantee - Mortgage lenders require you to have a management plan in place which is covered by a 10-year insurance backed guarantee if a property is being sold or purchased. We include this in all of our Managment plans as standard to ensure that you won’t be turned down for a mortgage.

What are our Qualifications?

Japanese Knotweed Expert are one of only a handful of companies in the UK that has a fully qualified PCA surveyor – this is the qualification a mortgage company will need to see on any reports that are produced. We also have the necessary NPTC qualifications including:

  • Pa1, Pa6 & Pa6aw

The ISO qualifications that we hold, ensure not only the correct processes are in place but also that we engage in the latest best practice methods.

  • ISO 9001:2016 certified
  • ISO 14001:2015 certified
  • BS OHSAS 18001:2007 certified

We also have a series of NVQs and diplomas including levels 1-3 in horticulture, making us more than qualified to deal with Japanese knotweed and any other invasive weed.

Japanese Knotweed Expert meet all the requirements of RIC’s and Mortgage lenders.

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Meet the Team

Jason Harker Website

Jason Harker


Jason is the Owner and Manager of the company and will always conduct the initial face to face meeting and carry out the site survey.

Jason is a qualified PCA surveyor which means he is recognised by the mortgage companies to survey a site for Japanese Knotweed. With 20 years of experience he is able to manage all your requirements.

Jason writes a column for The Sentinel on a fortnightly basis giving expert advice on a range of gardening topics. He is on the panel of expert gardeners for Radio Stoke where he answers many gardening questions.

Jason is married and has two sons.

Jade Lear

Senior Administrator

Jade is the Senior Administrator at Japanese Knotweed Expert. She is your first point of contact when inquiring about our services. She writes the detailed Site Surveys and Management Plans we provide. Jade can also liaise with Mortgage companies and Surveyors to ensure your mortgage application can proceed without delay. She also attends conferences with the Mr Harker to ensure she is up to date with any new legislation that is published.  In her spare time, she enjoys walking her dog and spending time with her family.

Kianat Basheer

Office Secretary

Kianat is our office secretary. She works closely with Jade to ensure that all our customers receive great customer service when enquiring about our services. She assists Jade in the writing of the Site Surveys and Management Plans and also creates the treatment reports. Kianat is working towards her BTEC Level 2 Business Administration and is progressing well. In her spare time, she enjoys travelling and spending time with her friends.

Emma Louise Watton

Office Manager 

Emma Louise is the Office Manager and deals mainly with Japanese Knotweed Experts Sister company,  JHPS Gardens Limited. She does, however, ensure that the office runs smoothly on a day to day basis and all necessary tasks are completed. She is working towards her Business Management Level 3 Diploma and she is progressing well. She also ensures she is up to date with all of the current legislation with regards to Invasive Weeds. In her spare time, she enjoys walking and spending time with her family.

Chris Jones Headshot website

Chris Jones

Site Manager

Chris has been with the company since May 2008. He is our longest serving member of the team and is well respected for his work ethic and ability on the job.

Chris is site based and heads up his own team as well as managing the other teams.

Chris holds a degree in Forensic Science as well as other NPTC & NVQ qualifications.

He plays Sunday league football and has a keen interest in motorbikes and enjoys going to music festivals with his long term girlfriend.

Jack Headshot Website

Jack Logan

Team Leader

Jack has been with us since May 2014 and is in charge of Excavation. He monitors the the excavation sites to ensure the work is completed on time and to a high standard.  He leads a team of 3 other members.

Jordan G Headshot Website

Jordan Greatorex

Team Leader

Jordan has been with the team since 2014 and is a team leader with three members on his team.

Jordan joined the team as an apprentice gardener and is now a Team Leader. He has achieved NPTC, Pa1, Pa6 and Pa6aw which means not only can he spray chemicals he use them near water courses as well.

Emma Candlin Website

Emma Candlin

Chief Operations Manager

Emma started with us in August 2013 and is the Chief Operations Manager. She oversees the operational running of the company and implementation of the company’s IMS practices. When not at work she spends time with her husband and two children.