The five “dangerous” garden plants that will devalue your home

Buying or selling a property is often a stressful time, especially when you have to deal with unforeseen problems. And with summer approaching, it pays to check your yard as there are plants out there that could devalue your home.

Newly published figures from surveyor Stokemont found five of the most common garden plants which not only damage your property, but can also devalue it.

To help you better identify invasive plants before you buy a new home, or to solve current problems in your garden, here are some useful tips to help you identify and remove them.

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Japanese knotweed

Japanese knotweed is an invasive plant with bamboo-like red shoots and shovel-shaped leaves. In spring and summer it can grow up to 3 meters high. But the worst thing about this plant is that its roots can reach up to 20 meters underground. It has a UK search volume of 90.5K and scores well in terms of distance difficulty.

According to Stokemont, underground spread of Japanese knotweed could disrupt pipes and drains and weaken building foundations or pavement, leading to collapse of foundations and poor flood control. Because of this potential damage, Japanese knotweed is listed by RICS Homebuyer Reports as a property defect, with the potential to reduce the price of your property by 5-15 percent.

Top: Check this out and take immediate action before it’s too late, either by seeking professional help or by using pesticides as an alternative method


English ivy is widespread across Europe and dangerous for your home! With a strong wall-climbing ability, this garden invader can easily enter your wall cracks, damaging the grout and bringing moisture or leaks into the house.

In the last 30 days, searches for ivy have increased by 45 percent, indicating inquiries from homeowners about this potentially difficult-to-manage plant. It has a UK search volume of 33.1K and has a low score in terms of distance difficulty.

Not all wall-climbing plants are harmful, such as B. Boston ivy. Therefore, before you accidentally cut some safe plants from your wall, consult a professional.

Top: Unlike giant hogweed, English ivy could be removed with bare hands by gently peeling it off the wall. It is also possible to kill them by cutting off their roots and letting them dry out.

Giant Bear Claw

Similar to Japanese knotweed, Giant Hogweed is also invasive with its ability to spread quickly. It is widespread throughout the UK, especially around rivers and ponds – and easier to spot in June and July.

This cow parsley-like plant has thick green stems with purple spots and white flowers shaped like a round umbrella. It is Sap is phototoxic and can cause severe skin burns or scars when exposed to sunlight. This plant has UK search volume of 22.2 KB and difficulty to remove it is high.

Top: While it does not cause direct damage to the property, buyers can still refuse to pay a higher price, if any, because of the high cost of removal – up to £15,000.

poplars, willows and oaks

While most trees do no harm, tall trees do Poplar, willow and oak can be dangerous if they grow near the property. Poplar root systems are shallow and fast-growing, can spread up to 40 meters and absorb 1000 liters of water and nutrients from the soil.

These trees can live for around 50 years and are harder to remove as their roots grow thicker and larger over time. It has UK search volume of 14.8 KB and medium removal difficulty.

If grown too close to your property they can introduce further risks of cracked foundations, subsidence and other structural defects that could potentially cost you £5,000 to £25,000 to repair.

Top: Your age, soil type, location, and depth play a role in deciding if your tree is a problem.

Himalayan Balm

As the name suggests, Himalayan balm originated in the Himalayas and was brought to Britain in 1839. It grows up to two to three meters tall and has pink flowers in summer and early fall.

Despite its beautiful colors, this invasive plant could seed 800 meters away or even be spread by rivers, potentially killing other plants and reducing biodiversity by stealing light, nutrients or water. It has a UK search volume of 12.1KB and a low removal rate.

It poses no physical danger to humans, but its significant ecological impact on nature and related laws are not favored by buyers.

Top: It is recommended to keep this plant under control or eradicate it and ensure it does not spread to your neighbors’ homes as it can be illegal.

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