Japanese Knotweed NI
Gardeners
Japanese Knotweed NI
190 Church Rd, Holywood
# Japanese Knotweed NI
Japanese Knotweed NI is a specialist invasive weed control company based in Holywood, operating as a dedicated division of Dalzell Landscape Co Ltd, an established Northern Ireland landscape business. With over two decades of experience tackling Japanese Knotweed across the region, they bring proven expertise to one of the UK's most persistent environmental challenges.
The company serves project managers, surveyors, estate managers, architects, property developers and homeowners facing Japanese Knotweed infestations. They work across diverse landscapes—from private gardens and housing developments to sensitive environments including river embankments, RSPB sanctuaries, universities, hospitals and protected areas.
What distinguishes Japanese Knotweed NI is their commitment to continuous innovation and technical excellence. Rather than following industry standards, they actively monitor and develop treatment methodologies, trialling new stem injection equipment and refining chemical formulations based on years of field experience. Their team holds specialist NPTC certifications including PA1, PA6A and the crucial PA6AW qualification for herbicide application near water sources—essential for treating knotweed in Northern Ireland's numerous riverside and loughside locations.
Beyond removal services, they provide comprehensive surveying, mortgage reports for property transactions, management plans and general advisory support. They also deliver bespoke training and awareness courses for professionals across construction, property and environmental sectors. This combination of technical proficiency, environmental awareness and educational commitment positions them as a thorough, science-led solution provider rather than a basic pest control operator.
Japanese Knotweed NI is a specialist invasive weed control company based in Holywood, operating as a dedicated division of Dalzell Landscape Co Ltd, an established Northern Ireland landscape business. With over two decades of experience tackling Japanese Knotweed across the region, they bring proven expertise to one of the UK's most persistent environmental challenges.
The company serves project managers, surveyors, estate managers, architects, property developers and homeowners facing Japanese Knotweed infestations. They work across diverse landscapes—from private gardens and housing developments to sensitive environments including river embankments, RSPB sanctuaries, universities, hospitals and protected areas.
What distinguishes Japanese Knotweed NI is their commitment to continuous innovation and technical excellence. Rather than following industry standards, they actively monitor and develop treatment methodologies, trialling new stem injection equipment and refining chemical formulations based on years of field experience. Their team holds specialist NPTC certifications including PA1, PA6A and the crucial PA6AW qualification for herbicide application near water sources—essential for treating knotweed in Northern Ireland's numerous riverside and loughside locations.
Beyond removal services, they provide comprehensive surveying, mortgage reports for property transactions, management plans and general advisory support. They also deliver bespoke training and awareness courses for professionals across construction, property and environmental sectors. This combination of technical proficiency, environmental awareness and educational commitment positions them as a thorough, science-led solution provider rather than a basic pest control operator.
Services offered
Japanese Knotweed surveysMortgage reportsManagement plansFoliar herbicide applicationStem injection treatmentRoot barrier installationIncineration servicesTraining and awareness courses