How to Tame the Japanese Knotweed Beast This Summer

It’s peak growing season all across the UK and the prolonged heatwave has given all sorts of plants — and weeds — renewed vigour, as long as they get the vital water they need to grow. Japanese knotweed is among the hardiest of (unwanted) plants and has been springing up and spreading its menacing roots across estate agents’ properties since spring belatedly sprung this year.

Simply ignoring the problem is not a solution. There are real risks with Japanese knotweed, both to the property and for the owner. These include the weed’s potential for causing structural damage as it grows through cracks in walls, as well as other issues, and potential legal problems if it spreads onto neighbouring properties. It can also make a house impossible to sell, as buyers are unlikely to get a mortgage due to the presence of the weed on the property.

Dealing with Japanese knotweed when it springs up during a tenancy may not be an estate agent’s responsibility, however. It will depend on the tenancy agreement and some tenants have been shocked to discover that not only is Japanese knotweed growing in their garden — and rapidly at that — but that it’s up to them to get rid of it. Trying to do it on your own, though, is an almost impossible task.

Identifying a Japanese Knotweed Problem

Trying to figure out if you have Japanese knotweed growing somewhere on your property can be a perplexing problem and it turns out that not many people even know what it looks like. A new survey by Japanese knotweed removal firm Environet found that only 19% of those questioned could properly identify this scourge of a weed. The survey asked respondents to pick Japanese knotweed from five photographs of different plants — 81% were unable to.

“Most people have heard of Japanese knotweed, but the fact that only 19% of people in the UK can identify it from other common plants, such as bindweed and ivy, is very concerning,” said Environet managing director Nic Seal. “It’s not just about protecting one’s property from damage and decreased value; it is also about protecting oneself from the risk of being sued if the knotweed is allowed to spread.”

The clue as to whether or not you have Japanese knotweed on your property is in how it starts growing — shoots will appear and they will be reddish in colour, somewhat resembling those of bamboo. When leaves appear, they will be heart-shaped and the plant will grow incredibly quickly — up to 20cm in a day — quickly overwhelming everything in the surrounding area. The plant flowers in the late summer and the blooms will be a sort of off-white.

Japanese Knotweed Removal

For estate agents managing properties and with others up for sale, it’s almost always a futile task to try and eradicate Japanese knotweed from an infected site. The large and deep root system will ensure that, even if everything above ground is cut down, it will soon send up new shoots to take its place and the problem starts all over again.

So if you’re searching for the most effective Japanese knotweed removal solutions, there’s really only one thing you need to know: you have to enlist a professional Japanese knotweed removal firm. The investment in such services is vastly offset by the potential for damage to a building, as well as a drastic lowering of its value.

It’s likely you will need an insurance-backed guarantee of the removal of Japanese knotweed, for sale or mortgage purposes, and a good Japanese knotweed removal firm will typically be able to provide one for five years, often extendable up to 10. That’s your knotty Japanese knotweed problem killed off.

EAN Content

Content shared by this account is either news shared free by third parties or sponsored (paid for) content from third parties. Please be advised that links to third party websites are not endorsed by Estate Agent Networking - Please do your own research before committing to any third party business promoted on our website. As an Amazon Associate, I earn from qualifying purchases.

You May Also Enjoy

Rightmove logo
Breaking News

Political uncertainty adds to the many distractions for summer buyers

The average asking price of newly-listed homes for sale drops by 1.0% (-£3,832) this month to £372,359, substantially larger than the average July drop over the last ten years of 0.2%, as new sellers try to tempt summer buyers who are facing many distractions: Number of available homes for sale is 1% below this time…
Read More
Breaking News

Here’s how to avoid garden rows this summer

Brits are being warned not to let summer fun turn into a neighbourhood battleground as BBQs, late-night parties, flying footballs and fence rows return to Britain’s gardens. With families spending more time outside, children playing for longer and homeowners tackling garden jobs, small irritations can quickly spiral when people are hot, tired and trying to relax. Jordan Kluth,…
Read More
Breaking News

Breaking Property News 16/7/26

Daily bite-sized proptech and property news in partnership with Proptech-X.   The Housing Market Does Not Need Saving: It Needs De-Risking   Thought leadership by Olivier Jauniaux, Founder of NestLink   “Everything starts with a good home,” Andy Burnham told a hall full of highly hopeful supporters at the People’s History Museum in Manchester in June 2026, in the…
Read More
Breaking News

Why the postcode can make a big difference to your rebuild costs

93% of UK properties are insured for the wrong amount, according to research by RebuildCostASSESSMENT.com. The regional breakdown behind this figure shows why location still matters when calculating rebuild values. National figures demonstrate the scale of the issue and regional data helps show where inaccurate sums insured are more common. “Two similar properties in different…
Read More
Rightmove logo
Breaking News

New record rents as rental supply falls for first time since 2022

The average advertised rent of homes outside London has risen by 1.9% this quarter to a new record of £1,397 per calendar month, the first quarterly rent record since Q3 2025: The average advertised rents outside London is now 2.3% higher than a year ago, an increase from 1.6% last quarter London also reaches a…
Read More
Breaking News

Our predictions for the property market in the second half of 2026

Allison Thompson, Chief Lettings Officer, Leaders part of LRG. There is a lot going on right now that’s impacting the property market, both in terms of direct legislation and the wider economy: Global conflicts affecting consumer confidence and interest rates Ongoing cost of living issues challenging affordability for homeowners and renters The recent introduction of…
Read More