Element Knotweed South WALES

Element Knotweed South WALES Element Knotweed South WALES Element Knotweed South WALES
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Element Knotweed South WALES

Element Knotweed South WALES Element Knotweed South WALES Element Knotweed South WALES
Home
Request Survey
What is Japanese Knotweed
Removal & Eradication
Treatment Plans & Control
Japanese Knotweed Photos
More Invasive Plants
  • Horsetail Removal
About Us & Blog
  • Blog
  • About us
Areas We Cover
  • Knotweed Removal Swansea
  • Knotweed Removal Cardiff
  • Knotweed Removal Bridgend
  • Knotweed Removal Newport
  • Knotweed Removal Torfaen
  • Knotweed Removal The Vale
  • Knotweed Carmarthenshire
  • Knotweed Pembrokeshire
  • Knotweed Caerphilly
  • Knotweed Merthyr Tydfil
  • Knotweed Monmouthshire
  • Knotweed Blaenau Gwent
  • Rhondda Cynon Taff
  • Neath Port Talbot
More
  • Home
  • Request Survey
  • What is Japanese Knotweed
  • Removal & Eradication
  • Treatment Plans & Control
  • Japanese Knotweed Photos
  • More Invasive Plants
    • Horsetail Removal
  • About Us & Blog
    • Blog
    • About us
  • Areas We Cover
    • Knotweed Removal Swansea
    • Knotweed Removal Cardiff
    • Knotweed Removal Bridgend
    • Knotweed Removal Newport
    • Knotweed Removal Torfaen
    • Knotweed Removal The Vale
    • Knotweed Carmarthenshire
    • Knotweed Pembrokeshire
    • Knotweed Caerphilly
    • Knotweed Merthyr Tydfil
    • Knotweed Monmouthshire
    • Knotweed Blaenau Gwent
    • Rhondda Cynon Taff
    • Neath Port Talbot
  • Home
  • Request Survey
  • What is Japanese Knotweed
  • Removal & Eradication
  • Treatment Plans & Control
  • Japanese Knotweed Photos
  • More Invasive Plants
    • Horsetail Removal
  • About Us & Blog
    • Blog
    • About us
  • Areas We Cover
    • Knotweed Removal Swansea
    • Knotweed Removal Cardiff
    • Knotweed Removal Bridgend
    • Knotweed Removal Newport
    • Knotweed Removal Torfaen
    • Knotweed Removal The Vale
    • Knotweed Carmarthenshire
    • Knotweed Pembrokeshire
    • Knotweed Caerphilly
    • Knotweed Merthyr Tydfil
    • Knotweed Monmouthshire
    • Knotweed Blaenau Gwent
    • Rhondda Cynon Taff
    • Neath Port Talbot

WHAT IS JAPANESE KNOTWEED?

Japanese Knotweed

Japanese Knotweed (Reynoutria japonica, Fallopia japonica) is a highly invasive and tenacious plant species native to East Asia. It was first introduced to the West as an ornamental plant in the 19th century. However, it quickly became a significant problem due to its aggressive growth and ability to spread rapidly, forming new stands from a fragment as small as a fingernail.

Think you have knotweed?

Characteristics and Growth Patterns

Japanese Knotweed is a herbaceous perennial plant that can grow over 10 feet tall. It has distinctive shield (some say heart-shaped) leaves with a pointed tip, growing in a zig-zag formation along branch. The canes are hollow, bamboo-like stems that are green speckled with red/purple. These usually form from the "Crown" a large brown mature clump of Rhizome protruding from the ground. During the growing season, which typically spans from early spring to late autumn, the plant exhibits vigorous growth, with new shoots rapidly emerging from the ground and forming dense stands. In late summer large stands are formed with clusters of creamy flowers. During winter the above ground growth "dies back" leaving brown brittle canes. 

The plant's underground system is equally formidable. Its extensive network of rhizomes can spread up to 7 meters horizontally and over 3 meters deep. These rhizomes can lie dormant in the soil for several years, making the eradication of Japanese Knotweed a challenging task.

The Problem with Japanese Knotweed

Japanese Knotweed structural damage wall pushing treatment removal survey development Wales Swansea

Japanese Knotweed is considered a serious problem due to its aggressive nature and its impact on both properties and native ecosystems. Here's why it poses such a significant threat.

Property Damage: The Knotweeds powerful rhizomes can penetrate deep into the ground and cause structural damage to buildings, roads, and underground utilities. Its roots can exploit existing cracks and weaknesses leading to costly repairs. 

Impeding Development: In areas where Japanese Knotweed has taken hold, it can hinder development projects and construction due to its destructive potential and difficulty to eradicate. Usually excavation and removal is required before further works can be continued. 

Japanese Knotweed Monocultre ecosystem biodiversity treatment removal survey development Wales

Biodiversity Threat

Japanese Knotweed outcompetes and  displaces native plant species, reducing biodiversity in the affected areas. Its dense, rapid growth shades out other plants, disrupting local ecosystems. 

Pictured a Japanese Knotweed monoculture during winter.

Japanese Knotweed flowers treatment removal survey development  excavation eradication Wales Swansea

Legal and Environmental Obligations in the United Kingdom

In the United Kingdom, Japanese Knotweed is recognized as a significant threat to the environment, properties, and infrastructure. As a result, there are legal obligations for landowners and property developers to consider removal, treatment and prevent the spread of this invasive plant. The legislation primarily addressing Japanese Knotweed is found in Section 9 of the  Wildlife and Countryside Act 1981, as amended by the Infrastructure Act 2015. 

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Based in Swansea, South Wales we cover all areas of the UK including Cardiff, Newport and West Wales. 

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