Home - DS Japanese Knotweed Specialists

Various DSJKS Information for you

Featured Highlights

5 & 10 Year Warranty

5 or 10 year Warranty is available for purchase at the end of the treatment plan and the Warranty will cover treated areas only
Should the client suspect regrowth he should take a picture and forward to DSJKS for inspection
In the event of new regrowth within the treatment areas we will provide follow up treatments as required during the Warranty period at a reduced cost

DSJK Specialists Pay as you Spray

No extra charges for pay as you spray. (Some companies add a percentage charge for this option)
No upfront payments
Invoice settled before receipt of spray visit record (SVR)
Client is in control of their funds
In the event of company closure the client will have a copy of all up to date spray reports for proof of treatments to pass onto a new third party company
After two years of no growth final visit report issued

Serving Inverclyde, Scotland and the UK

About DS Japanese Knotweed Specialists

We provide tailored solutions to clients around the country.

The Expert behind the Solution: Derek Smith

With over 20 years of hands-on experience in Japanese Knotweed treatment and removal, I have dedicated my career to helping property owners protect their homes, land, and investments. What started as a small local operation has grown into a trusted name in invasive species control—known for thorough assessments, effective treatment plans, and long-term results.

I understand the stress and uncertainty that comes with discovering Japanese Knotweed and my mission is to make the process clear, manageable, and fully compliant with legal and environmental standards. Whether you’re a homeowner, developer, or commercial client, I bring expert knowledge, personal service, and proven results to every project.

Methods Overview

5 & 10 year Herbicide treatment plan with warranty options
Full Excavation and transfer to landfill with 2 year monitoring programme
Partial excavation and cap with root barrier (copper mesh) with 2 year monitoring programme
Excavation and burial on site (encapsulation with root barrier) with 2 year monitoring programme
Excavation and relocation with 5 or 10 year treatment plan with warranty options
Excavation slip trench with root barrier on property boundary
Dig, sift out roots and re-use soil with 2-year monitoring programme and warranty options. (Small area hand dig with hand tools)