Garden plants that pose ‘high risk’ and devalue a home by 15% – ‘not easy to eradicate’

These plants have nothing to do with the stylish garden ideas you have implemented, like the roses in your back garden or the hydrangeas beautifully planted next to your driveway. surveyors have discovered that there are a handful of certain garden plants that can have an insidious effect on your home, potentially reducing the value of your property by as much as 15 percent. So which plants could ruin the value of your home? You have to pay attention to these if you want to sell your house – in the order of possible damage.

Japanese knotweed

First on the list is the Japanese knotweed. A notorious weed among people looking to buy and sell a home, it could seriously damage the foundations of your property.

Aaditya Bhatta, publisher and founder of Plantscraze, stated that if left to its own devices, it will cause costly damage.

She said: “The massive root system of the Japanese knotweed exploits weaknesses in building foundations and connecting drainage systems, causing gradual damage, resulting in a faulty structure over an extended period of time.

“Japanese knotweed poses a high risk to foundations, walkways and gardens as its fast-growing root system can cause costly damage.”

Understandably, this can be an extremely unattractive prospect for potential buyers.

Unfortunately, it is also quite difficult to remove.

Experts suggest you’re infinitely better off calling the experts — before people come to visit.

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Giant Bear Claw

While this one may look like a bouquet of beautiful white flowers, it’s deceptive – it’s actually as bad for your home as its rather frightening name might suggest.

The giant hogweed spreads quickly but will not cause any structural damage to your home.

In fact, it can cause serious skin irritation instead.

It is also difficult to remove and therefore expensive to remove (calling in the professionals can cost up to £15,000).

Claudia de Young, landscape and garden consultant, explained: “It cannot be eradicated simply by logging.

“It’s a very hardy plant and needs to be dug up with the roots attached, leaving no part of the plant in the ground.”

This and its danger to your skin can absolutely put off potential buyers who may be less inclined to buy your property until it’s gone so they don’t have to pay for the removal themselves.

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Large trees such as poplars (and willows or oaks) in close proximity to your home can also be detrimental to the sale.

Because their roots can spread up to 40 meters and disturb the building structure.

Claudia said: “Some tree roots can potentially get under the foundations, lifting pavement, blocking drains and causing serious settlement or structural cracking.

“Not all adult trees cause structural damage when planted near buildings, but it can happen.”

Bradley McKenzie, a property surveyor in Stokemont, clarified, “Your age, soil type, location and depth play a role in determining if your tree poses a problem. If so, it could cost £5,000 to £25,000 to repair.”

So it’s no wonder they could risk the overall value of your home.

Himalayan Balm

Himalayan Balsam can look pretty, with showy purple flowers. But if you find this plant in your yard, it’s probably best to get rid of it as soon as possible.

Its potential damage to nearby ecosystems makes it risky to have around.

Claudia explained, “Himalaya balsam is another non-native species that competes aggressively, finding its way into gardens and shading our native plants.

“It’s illegal to plant it and let it grow wild. Although its nectar-rich flowers will attract pollinating insects, this will distract them from visiting native species.

“Because of its rapid growth, it can also block waterways and increase the risk of flooding.”

Bradley added, “Its significant environmental impact on nature and associated laws are not favored by buyers.

“Therefore, it is recommended that this plant be controlled or eradicated.”

Luckily, however, it’s easier to remove than the above plants, and Claudia suggests that hand-pulling and trimming the plant before it sets seed is a good first step.


Yes, this vine might look picture perfect, especially perched atop an old English country house, but if you have the wrong variety, ivy could cause cracks in your structure, allowing moisture to seep through.

Aaditya explained, “While ivy can improve the appearance of a home, its strong attachment to walls can worry some homeowners as it can damage wall surfaces or clog drains and gutters.

“To avoid structural damage to the house, large ivy plants on the walls must be removed.”

She suggests using mowers to trim ivy on the ground first.

The expert added: “If you have ivy on your walls, they will dry out if cut from below.

“To properly put away leftover vines, remove them after they have dried up.”

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