As milder weather encourages more Britons to spend time outdoors, many may be contemplating which plants to cultivate in their gardens. With countless varieties available, selecting those that will thrive can prove challenging.
However, home insurance specialists are cautioning that several of Britain's most popular garden plants could potentially pose risks to properties.
Insurance experts at Norton Insurance Brokers have highlighted a number of "garden favourites" and invasive species that may cause expensive property damage and could even lead to insurance claims being denied if not properly managed. Those with these plants in their gardens should familiarise themselves with the relevant legislation.
Wisteria
While wisteria is an attractive plant, it carries concealed dangers that property owners often fail to recognise until it's too late.
Mark Wilkinson, managing director at the firm, explained: "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."
He continued: "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."
If left unchecked, wisteria can dislodge roof tiles or guttering. The specialist also noted that when planted in close proximity to a building, its root network can begin to compromise underground drainage systems.
Bamboo
Once it takes hold, bamboo's subterranean root system can spread rapidly, sometimes extending metres away from where it was initially planted. It has the potential to lift patio slabs, break through driveways and, in the most severe instances, even emerge through floorboards inside properties.
The specialist explained: "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 is no legislation prohibiting its cultivation, though legal obligations do exist, the specialist noted. Should your bamboo encroach onto neighbouring land and cause harm or disruption, you may face liability under a civil nuisance claim.
Japanese knotweed
Japanese knotweed remains the most widely recognised plant linked to property damage, notorious for its rapid spread. It can push through gaps in paving, walls, and drainage infrastructure, and is frequently associated with complications related to property sales and mortgage lending.
The specialist 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 remains a familiar feature on British properties and garden walls, valued for its year-round greenery. However, the plant has a reputation for damaging the structures it climbs. Its tiny roots possess remarkable strength, able to penetrate cracks and mortar joints.
The expert explained: "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."
They added: "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."
