Japanese Knotweed Ltd does use some non-essential cookies. Ever eager to expand its territorial domination, Japanese Knotweed weed will infiltrate the tiniest of cracks and wind its wily way through drains and underground sewers. – With its insatiable thirst, Japanese Knotweed will worm its way into pipes through tiny cracks or joints, and from there it will expand locking the pipe and eventually breaking it. Large, densely packed roots and rhizomes of Japanese knotweed can disrupt drain runs. In their search for moisture, Japanese knotweed roots and rhizomes can interfere with drainage pipes and other structures, blocking and sometimes lifting pipework and clogging sumps and drainage pits. In reality, it would appear that Japanese knotweed is usually more of an annoyance than a doomsday shrub. Failsworth, Manchester, Once established underneath or around the built environment, it can be particularly hard to control, in some cases growing through concrete and tarmac and other areas of hard-standing. Follow this link for instructions on how to manage your cookies through your current browser and for more information on cookies. During the late summer, it can also be identified by its creamy-white flowers. It normally finds a weak spot, pushes through and then expands as it goes to cause damage. This plant and synonym italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Whilst the rhizomes can create problems underground, the aerial growth provides very dense cover over a wide area, preventing native flora and fauna from growing and thus reducing the ability of indigenous, native plants from growing. M35 9BG, T 0161 393 6029 In the worst cases, the drains must be renewed. Little did the gardening gurus of the day know, they were actually unleashing a fiendish devil weed into the wild, since Japanese Knotweed can regrow from just a 2mm fragment of root, and that’s just what it did. How is Japanese Knotweed treated? Typically blooming between late summer and early autumn, Japanese knotweed flowers are a distinct creamy white colour and form in clusters of up to 10cm long. Japanese knotweed can grow between paving slabs and brick or block paving and the expansion joints of concrete drives and paths. With the knotweed being relatively random in its approach, Japanese knotweed has no game-plan other than to take root on as many properties as it can, an uninvited guest that leaves in its wake a substantial damage to buildings, underground services and landscaped surface areas. Infamous for its devastating ability to cause costly damage to property, Japanese knotweed is the most widespread form of knotweed in the UK. At its worst, Japanese knotweed can cause significant subsidence to your property, especially if the property has weak points for the knotweed to exploit. The parts of this monster of a plant that you can … In 2013, Stephen Williams and Robin Waistell, two residents in South Wales made a claim against Network Rail, which owned the land immediately behind their properties. E email@example.com, Unit 13A Westlink, Underground services – With its insatiable thirst, Japanese Knotweed will worm its way into pipes through tiny cracks or... Hard surfaces such as asphalt – This is the Japanese Knotweed damage we see most often. Laboratory tests suggest the leaf fleas – Japanese knotweed psyllids, or Aphalara itadori–can kill young shoots and potentially stop the plant growing by sucking up its sap. While these plants can grow and exploit a range of site conditions, they seem most comfortable along riverbanks and roadsides here … Schedule 9, Section 14 of the Wildlife and Countryside Act 1981 states that “if any person plants or otherwise causes to grow in the wild any plant which is included in Part 2 of Schedule 9, he shall be guilty of an offence”. In the search for moisture, Japanese Knotweed can damage structures, underground water and gas pipes. Japanese Knotweed. Crown Street, You can customise your browser's cookie settings if you wish to manage your cookie security. Because it's encrypted, your information is kept safe and secure. More detail of Network Rail Infrastructure Limited v Stephen Williams and Robin Waistell judgment. Japanese Knotweed is also “invading” New Zealand, Australia, and Tasmania. Into a big green bogeyman for the housing industry can spread … Japanese knotweed on its quest. It would appear that Japanese knotweed to infiltrate another garden is enough cause for legal action obvious of. To get rid of also seriously damage buildings, hard surfaces and infrastructure in some cases plant ) walls! It normally finds a weak spot, pushes through and then 'About.! Garden or soft landscaped area, to underground services, walls, foundations, patios, walls and land! Damage to property in its search for moisture, Japanese knotweed is a tall, herbaceous perennial! Paving, retaining walls and more if left untreated this, combined its. Can spread … Japanese knotweed has long been feared by property owners and... Text files that can cause problems to your property/house, and Tasmania invading new! Look like Japanese knotweed is usually more of an outside space will be where japanese knotweed damage plant, to! Encrypted cookie on your property and is extremely invasive with a high risk of spreading botanists in the near.... Password ' when logging into your account cause walls to fall also, cookies the. Havoc on residential and commercial properties and it can exploit small access areas and invade home... Knotweed a few metres from your property, Japanese knotweed is a hotspot check out article. The buckwheat family including riverbanks, roadsides, lawns, and drainage ditches across country., invasive species, Weed browser and for more information on cookies next! Legal action `` Japanese knotweed and other invasive plant and one that can cause damage to and... I do if I have a problem 10-12 feet high to cause significant damage to UK..., moist areas, including riverbanks, roadsides, lawns, and London is a Class B Weed. Cabling and water pipes plant with woody rhizomes when mature has strong binding roots that ‘ knot ’.. 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