Japanese Knotweed

If you have, or think you have, a Japanese Knotweed and would like a free no obligation quote to implement a management plan, please to not hesitate to contact us today.

What is Japanese Knotweed?

Japanese knotweed also known as Japanese Bamboo, are the most invasive plants in the UK and is one of only two terrestrial plants listed in the UK Wildlife and Countryside Act.

It is a tall herbaceous perennial with bamboo-like stems that when mature have purple speckles.  Dead stems look like dried bamboo canes.  Leaves are shaped like shields and alternate up the stem and are a pale yellowy – green colour when mature.  If you require further information on identifying your Japanese Knotweed please click here for information on a mobile app that helps you further.

Japanese Knotweed was brought to the UK in the nineteenth century, by the Victorians as an ornamental plant. In Japan it was grown for animal feed and self controlled by fungi and insects that do not exist in the UK.

Japanese Knotweeds effect on native species is often devastating.  It outcompetes indigenous species by using all the nutrients, grows faster and taller covering large tracts of land.  The outcome is an exclusion of the Native flora and their associated fauna making it one of the UK’s most problematic invasive weeds.

Unlike other plants, Japanese Knotweed does not need to seed in order to regenerate. 

It commonly grows in urban and rural areas particularly on waste land and cemeteries where the ground is heavily disturbed.  Railways and river banks are good transport systems for the rhizome fragments allowing it to spread over long distances and cause devastation to flood defences and railway embankments making them unstable.

In domestic situation Japanese knotweed can cause serious implications to your property.  It can push its way through patios and pavements and can be seen as a risk to the foundations of your home.  If you come to sell your house, mortgage lenders may refuse mortgages on properties that have Japanese Knotweed.

If you allow Japanese Knotweed to spread from your property to that of a neighbouring property, you could be sued for the clearing up costs.

For property developers the eradication of Japanese Knotweed can be a real headache and hold up the development of a site for years.  It can also influence the planning application of the site by the planning officers.  If Japanese Knotweed is found on site then a management plan needs to be put in place not only to treat and remove the Japanese Knotweed but to also ensure that it is not spread.

For more information on this please read the Environment Agencies the Knotweed Code of practice which can be downloaded here

Removal of Japanese Knotweed

Japanese Knotweed is classed as a “controlled waste” and therefore need specialist disposal.  It must under no circumstances be included in household waste.  Failure to do so could lead to prosecution under Section 34 of the Environmental Protection Act.
Chris Lake - Sherburn in Elmet Gala Association
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