Knotweed warning: Why this plant should fill you with dread if it appears in ...

japanese knotweedBritons have been warned to look out for signs of Japanese Knotweed in their gardens (Image: GETTY)

Japanese Knotweed, listed by the World Conservation Union as one of the most invasive species on the planet, is cropping up in green spaces across Britain. Many Britons are unable to identify the nuisance weed which can easily blend in with surrounding shrubs. Due to its rapid growth and root system, knotweed poses a significant risk to concrete foundations, thus endangering the stability of homes. 

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A team of gardening experts are warning people to be on the lookout for the unwelcome plant and have revealed five key tell-tale signs. 

Chris Bonnett of said: “Just going from its appearance, Japanese Knotweed is the kind of thing you might welcome in your hedgerow. 

“To some it can look quite attractive with its creamy white flowers and heart shaped leaves – but before you know it, it’s taken hold and is eating through the walls of your house. 

“Japanese knotweed is so invasive that it can grow by a metre a month and can cause damage to your home – but the trouble is it can very easily be mistaken for a shrub by a novice gardener. 

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