Giant Knotweed

Experts in invasive Giant Knotweed control across Scotland. Safe, effective solutions for removing this fast-spreading, damaging plant.

What is Giant Knotweed?

Giant Knotweed (Fallopia sachalinensis) is a fast-growing, invasive perennial plant related to Japanese Knotweed. It can reach heights of over 3 metres and forms dense thickets that dominate natural landscapes and urban areas. Though less common than its cousin, Japanese Knotweed, it is just as destructive.

Native to Sakhalin Island in the Russian Far East, Giant Knotweed was introduced to the UK in the 19th century as an ornamental plant. Its ability to grow quickly in poor soil and spread aggressively through rhizomes has made it a serious concern across Scotland.

How Does Giant Knotweed Spread?

Giant Knotweed spreads aggressively through its rhizomes (roots). It spreads through the movement of rhizome fragments, which are underground stems that can sprout new plants when detached.

Issues Caused by Giant Knotweed

What are the Environmental Risks?

Giant Knotweed suppresses native vegetation, weakens biodiversity, and increases the risk of soil erosion. Its tall, leafy canes shade out native plants, and its root system can grow several metres deep and wide, damaging drains, infrastructure, and embankments.

What are my Legal Responsibilities?

It is an offence under the Wildlife and Countryside Act 1981 to cause Giant Knotweed to grow in the wild. Landowners must prevent its spread to neighbouring properties or land. Non-compliance may lead to enforcement action and costly remediation.

Identification Of Giant Knotweed Throughout The Year

Seasonal Growth Cycle

Spring: Rapid shoot emergence with red-tinged leaves.
Summer: Reaches full height with large, heart-shaped leaves.
Autumn: Produces clusters of small, white-green flowers.
Winter: Above-ground stems die back, but rhizomes remain active underground.

Detailed Giant Knotweed Characteristics

Stems: Hollow, bamboo-like canes with purple speckles, often over 3m tall.
Leaves: Large (up to 40cm), heart or oval-shaped with wavy edges.
Flowers: Tiny green-white blooms in late summer.
Roots: Extensive rhizome system that can grow 7m laterally and 3m deep.
Seed Spread: Mostly spreads vegetatively, but hybridisation with Japanese Knotweed is possible

Treatment and Control of Giant Knotweed

Our trusted approach ensures long-term control, protecting property and environment alike.

How to Remove Giant Knotweed

At JBB Knotweed Solutions Ltd, we offer tailored, compliant solutions for the safe and effective removal of Giant Knotweed across Scotland.

Our Treatment Methods

Herbicidal Treatment: Targeted application of approved herbicides can be effective, especially when timed correctly in the plant’s growth cycle. Multiple treatments may be required over several seasons for complete control.
Mechanical/Manual Removal: In certain cases, cutting back or excavating the plant is necessary. Full excavation of the rhizome systems followed by secure, licenced waste removal is required.
Optional root barrier membranes will prevent lateral regrowth into surrounding land.

Book a Survey

We can confirm if you have Giant Knotweed on your property and recommend the best course of action.