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

Breaking News

Buy-to-let lending growth matches FTBs and homemovers

The latest market analysis from Alexander Hall has revealed that buy-to-let mortgage lending has grown at an average quarterly rate of 7% over the last year, matching the pace of growth seen across both first-time buyer and home movers, as improving mortgage market conditions continue to support borrowing demand for rental properties. Alexander Hall analysed…
Read More
Rightmove logo
Breaking News

Prices stand still in February but still strongest start to a year for prices since 2020

The average price of newly listed homes for sale is virtually flat in February , down by just £12 (-0.0%) to £368,019 Despite the standstill in prices in February, January’s record asking price increase for the time of year means that it is still the strongest start to a year for asking prices since 2020,…
Read More
to let sign 2025
Breaking News

Game-changing online letting platform set to slash landlord costs

New AI-enabled technology service promises to save London landlords thousands A new online letting platform is set to disrupt the capital’s property management sector, offering landlords significant savings per property. Prop247, launching this month, combines cutting-edge technology with on-the-ground agents to deliver what its founders claim is the UK’s first truly end-to-end remote letting service,…
Read More
Breaking News

Breaking Property News 13/2/26

Daily bite-sized proptech and property news in partnership with Proptech-X.   96% of proptechs fail to get to series A funding – here is why Thought Leadership by Andrew Stanton, CEO Proptech-PR The proptech sector has never been short of ideas. From AI-driven valuations and digital conveyancing to smart buildings and tokenised real estate, innovation in property…
Read More
Breaking News

Landlords unprepared for the Renters’ Rights Act

Three quarters have made no preparations for the end of Section 21, despite major reforms taking effect from May 2026 New research from Inventory Base has revealed widespread lack of preparedness among UK landlords ahead of the first phase of reforms under the Renters’ Rights Act (RRA), due to come into force on 1 May…
Read More
Breaking News

Why capital is staying in London despite a cooling housing market

By Joe Freedman, Head of Origination at ASK Partners London isn’t suffering from a lack of housing demand. It’s suffering from a failure to deliver. New data from Molior underlines the scale of that failure. Just 5,547 private homes broke ground across the capital last year, an 84% drop from a decade ago. Against an…
Read More