Japanese knotweed was first introduced into Holland in 1829 by adventurer Philipp Franz Von Siebold and was later imported into this country in 1840. By 1969 people began to realise that it might have been a bad idea but by then it was too late. Since then, it has spread its tendrils the length and breadth of this country. The government now spends millions trying to control it, but to no avail.
The World Conservation Union has listed Japanese knotweed as one of the world's worst invasive species, causing damage to more or less anything it comes into contact with. It grows in dense colonies that crowd out other plants and continues to be a problem globally.
The plant has a large network of roots so in order to eradicate it you would need tackle it at the roots. This is much easier said than done. Some people say you can manage the plant by applying Glyphosate to the stems via injection but this is a long and laborious process that has not been proven to provide long term results.
When disposing of Japanese knotweed, it is classed as controlled waste and must be disposed of very carefully as it will grow almost anywhere and very quickly. The future for this plant at present seems promising. We want to try to make sure that Japanese knotweed does not have a future in this country.