View our members

Here you’ll find a full list of INNSA members. You can find a more detailed company profile which includes accreditations, qualifications held, which locations covered and all species dealt with, when you click read more under each profile.


Japanese Knotweed Solutions Ltd

Accredited Contractor and Consultant Member

Japanese Knotweed Solutions is the largest and longest-established Japanese knotweed company in the UK, with over eighteen years’ experience on projects of all sizes. We are the pre-eminent experts in the field and the first company to recognise the problems with Japanese knotweed. We have the greatest number of successfully-completed Japanese knotweed projects of any UK company. We offer a full variety of services including site assessments, a range of treatment methods and on-going site maintenance. All of our works are carried out by in-house teams, in accordance with the industry Code of Practice. We have offered a unique insurance-backed warranty for half a decade, which can provide cover for up to twenty years.

about us

Japanese Knotweed Solutions Ltd

Company: Japanese Knotweed Solutions Ltd

Company Type: Accreditied INNSA Contractor and Consultant Member

Accredited: Yes

Address: Itadori House, Melton Street, Radcliffe, Manchester, Gtr Manchester, M26 4BR, UK

Contact: Suzanne Hardy

Tel: 0161 723 2000

Position: Contracts and Marketing

Locations: All Regions

Clients- Private Individuals: Yes

Clients- Business:Yes

Waste Carriers License: Yes

Mobile Treatment Permit: Yes

National permit to incinerate: Yes

Environmental permit: Yes

Basis Accredited:Yes

Amenity Assured:Yes

PI Insurance: Yes

Employers Liability Insurance: Yes

Hired in plant insurance: Yes

Public Liability Insurance: Yes

Number of Staff: 28


Email: [email protected]

ISO 9001:2008: Yes

ISO 14001: Yes


First Aid: Yes

H&S: Yes


Personal Track Safety: Yes


Asbestos Aware: Yes

CAT Scan Cert: Yes

Forward Tipping Track Dumper: Yes

Articulated Dumper: Yes

Tipper Dumper: Yes

360 Tracked Exec:Yes

Mobile Treatment Permit: Yes

Dedicated In-house Surveyors: Yes

Relevant Degrees or professional qualifications: Yes

Relevant Degree Details:  Mike Clough – BA Hons Landscape Architecture; Alex Dayes – BSc Environmental Conservation;

Natalie Roberts – BSc Physical Geography; Stuart Morris – BSc Biology; Jonathan Harris – BSc (Hons) Ecological Science & Wildlife Management and IEMA

PA1: Yes

PA6: Yes

PA6AW: Yes

Chainsaw: Yes

Aerial Rescue: Yes

Maintenance Equipment Safety: Yes



Japanese Knotweed (Fallopia japonica)

Giant Hogweed (Heracleum mantegazzianum)

Himalayan Balsam (Impatiens glandulifera)

American Skunk-cabbage (Lysichiton americanus)

Broad leaved dock (Rumex obtusifolius)

Canadian Goldenrod (Solidago canadensis)

Cotoneaster (Cotoneaster species)

Creeping thistle (Cirsium arvense)

Curled dock (Rumex crispus)

Evergreen Oak (Quercus ilex)

False Acacia (Robinia pseudoacacia)

Giant Rhubarbs (Gunnera species)

Horsetail (Equisetum species)

Hottentot Fig (Carpobrotus edulis)

Japanese Rose (Rosa rugosa)

Marestail (Hippuris vulagaris)

Ragwort (Senecio jacobaea)

Rhododendron (Rhododendron ponticum)

Russian-vine (Fallopia baldschuanica)

Spear thistle (Cirsium vulgare)

Turkey Oak (Quercus cerris)

Case Studies

River Douglas, Wigan

River Douglas, Wigan Treatment of large amounts of Japanese...
Read More

Narvick Way, North Tyneside

Narvick Way, North Tyneside Excavation from construction area, with...
Read More

Lanark Way, Belfast

Lanark Way, Belfast Site survey and treatment plan for...
Read More

Latest News

What are the biggest problems facing INNSA members?

In the coming week, we will be sending out an...
Read More

Invasive Aliens – What’s it all about?

So, contractors, how do you explain “Invasive Alien Species” to...
Read More

What’s it all about?

Invasive weed control is a relatively new market. While companies...
Read More