As milder weather encourages more Brits to venture outdoors, many are contemplating which plants to cultivate in their gardens. With such a wide array of choices, selecting the right ones for your outdoor space can prove challenging.
However, home insurance specialists are cautioning that several of Britain's most popular garden plants could put properties at risk.
Experts at Norton Insurance Brokers have highlighted a number of "garden favourites" and invasive species that can cause expensive property damage and may even lead to insurance claims being rejected if not properly managed. Gardeners ought to familiarise themselves with the regulations governing these plants if they're growing them.
Wisteria
Wisteria is a beautiful plant, yet it carries hidden dangers that homeowners often don't discover until it's too late. Mark Wilkinson, managing director at the firm, said: "Known for its elegant, cascading blooms, wisteria can be surprisingly aggressive behind the scenes. It grows quickly and develops thick, woody stems that twist around anything in its path."
As the stems mature, they exert pressure on walls, gutters and rooflines, gradually widening gaps and creating potential entry points for water and frost damage. When left unchecked, wisteria can even displace roof tiles or guttering. The specialist added that when planted too near a building, its root network can begin to disrupt underground drainage systems.
Bamboo
Once it takes hold, bamboo's underground root system spreads rapidly, sometimes extending metres away from where it was originally planted. It's strong enough to lift paving slabs, crack driveways and, in the most serious cases, even push through floorboards inside homes.
The expert said: "Bamboo isn't specifically excluded from all insurance policies yet. However, insurers usually classify damage from plants as gradual and preventable. If it's determined that the bamboo was planted deliberately or allowed to spread unchecked, any resulting damage may not be covered, with claims potentially rejected due to poor maintenance."
At present, there's no legislation prohibiting its planting, though legal obligations do exist, the expert explained. Should your bamboo spread onto a neighbour's land and cause harm or disruption, you could face a civil nuisance claim.
Japanese knotweed
Japanese knotweed remains the most recognisable plant associated with property risk, known for its rapid spread. It can grow through cracks in paving, walls and drainage systems, and is widely associated with concerns around property sales and mortgage lending.
The expert said: "Japanese knotweed can create legal and financial issues if it is allowed to spread to neighbouring land. Homeowners selling a property may also need to disclose known knotweed issues, and buyers, lenders and insurers will usually want to understand whether a treatment plan is in place."
English ivy
English ivy is a familiar feature on British homes and garden walls, admired for its year-round greenery. However, ivy is well-known for causing harm to the structures it attaches itself to. Its tiny roots possess remarkable strength, able to work their way into gaps and mortar joints.
The expert said: "Insurers typically see damage caused by ivy and other creeping plants as a maintenance issue rather than a sudden, insurable event. If ivy contributes to structural damage, a claim may be refused on the grounds of neglect. Regular trimming and keeping ivy away from the main structure is strongly advised."
There's also a potential legal complication to consider. Ivy provides shelter for nesting birds, and under the Wildlife and Countryside Act 1981, it's illegal to damage or destroy any active wild bird's nest. If you're thinking of removing ivy, always check for nesting activity, especially during spring and summer.
