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The Sleeping Menace: Japanese Knotweed in Winter


Japanese Knotweed Lies Dormant in Winter

Winter has taken hold and now that the temperatures have plummeted from our modest summer highs, many of our native and non-native plants have perished for this year. These perennial plants may look dead now but they are no doubt laying dormant in the soil ready for new growth in the spring. Japanese knotweed is such a plant. After rapid growth from spring through till autumn, the plants die back; the leaves turn yellow then fall leaving a bamboo like stem standing in its place whilst the rhizome system lies dormant beneath the soil.

Despite the Japanese knotweed’s dead appearance in winter, there is still potential to spread of the plant if it is handled incorrectly and irresponsibly. The Japanese knotweed’s rhizome structure is capable of surviving extreme temperatures and its energy reserves will keep it alive through the winter months. Accidental distribution of the rhizomes may not be apparent until little red knotweed shoots start appearing in springtime. So, think ahead! If you have Japanese knotweed on your site then prevent access to it until it can be eradicated. There are plenty of eradication strategies that can be done throughout winter.

Japanese knotweed eradication should always be carried out by a Japanese knotweed eradication company such as Invasive Weeds Agency because it is vital that the work is done by trained and qualified people to ensure that the law is upheld at all times and undertaken in a manner that minimises the risk of any further spread. More information on the legislation surrounding Japanese knotweed can be found within our website.

For expert advice on Japanese knotweed eradication, call Invasive Weeds Agency on 0845 676 9252 or contact us here for a free quote.

IWA. Getting to the root of the problem.

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