What is Japanese Knotweed?

What is Japanese Knotweed?

Japanese Knotweed (Fallopia japonica), also referred to as Polygonum cuspidatum, Reynoutria japonica and Fallopia japonica, is a highly invasive perennial weed that is spreading throughout the UK at an alarming rate.

Japanese Knotweed is a highly invasive plant and is recognised as the most invasive species of plant in Britain today.

Japanese Knotweed is a hardy plant and spreads quickly. It can grow up to 3 metres and flourish in any terrain. Japanese knotweed was imported in the 19th century as a plant to feed cattle. Although Japanese knotweed can look attractive it overwhelms other plants. It grows aggressively and can effectively damage properties.

It can grow at an incredible rate of over 20cm per day! That's one of the fasted growing plants in the UK.

This is because the stem growth is renewed every year from the deeply penetrating rhizomes (underground roots) and the fact that knotweed has no known predator in the UK.

The plant has no natural predators which means it can grow freely without the feart of attack from any other living thing.

The plant does not produce seeds but does grow underground. This means that you may not see it spreding initially until the shoots come through the soil and start to grow very fast.

Japanese Knotweed sleaves are shaped like hearts and have sprouts that have a red coloured tinge to them. In summer,

It is singularly aggressive, crowding out all other flora and breaking through seemingly impenetrable barriers such as tarmac, concrete and brickwork.




Japanese Knotweed

Read the most common questions about Japanese knotweed here and find out many of the common answers. Us this page as your start in the battle against Japanese Knotweed.

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What is Japanese Knotweed?

Japanese Knotweed (Fallopia japonica) was introduced to Britain togetin the middle of XIX century as an ornamental garden plant. It was first described by Dutch naturalist Maarten Houttuyn in 1777 from Japan under the name Reynoutria japonica.

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How to identify Japanese Knotweed

Japanese knotweed emerges as small shoots green/purple in colour. As the plant develops it produces small shield-shaped leaves growing from the stem's many sticking out nodules or knots. Once it's grown in to maturity, the leaves turn bright green colour and can grow to over 100cm in length.

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Japanese Knotweed treatment services

Japanese knotweed infestations can be eliminated through a variety of methods. Depending on factors such as the time you have, the location of the infestation and the environment it's found in the method can vary. Through correct application, Japanese knotweed growth can be limited and prevented from coming back.

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