Homeowners dreaming of a lush garden should beware: certain plants could be 'quietly wreaking havoc' on their property's structure, according to property expert Kevin Barzegar of Kaybridge Residential. He warns that plants like English ivy, bamboo, Japanese knotweed, and willow can cause cracked brickwork, damaged drains, and even legal trouble, potentially knocking thousands off a home's value.
English ivy, though charming, is 'one of the worst offenders,' with roots that penetrate cracks in brickwork and expand, causing serious damage. Removal is a major job, and Barzegar recommends opting for flowering climbers like roses or clematis instead.
Bamboo, popular for privacy screens, has aggressive root systems that spread horizontally underground, travelling several metres from the original plant. These roots can push through paving, damage structures, and crack foundations. Once established, they are extremely difficult to control, as even tiny root fragments can sprout anew.
Japanese knotweed is every homeowner's worst fear, often rendering properties unsellable. Under the Wildlife and Countryside Act 1982, it is illegal to allow it to spread into the wild, and if it invades a neighbour's land, homeowners could face civil claims and expensive removal costs. Treatment can cost between £900 and £20,000, depending on severity.
Willow trees, while beautiful, have roots that actively seek water, targeting drains and pipes. A 10-metre willow can have roots stretching 30 metres, easily reaching underground pipes. Barzegar advises planting willows at least 40 metres from buildings or choosing smaller trees like Japanese maples.
