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

to let sign 2025
Breaking News

Thames Valley Rents Surge to £1,448 – 6% Above UK Average

Average rents in Thames Valley reach £1,448 pcm, nearly 6% above the UK average, new report reveals Rents in Thames Valley reach £1,448 pcm, nearly 6% above the UK average of £1,369 Wokingham and Reading highlighted as key areas of interest for renters and investors Renters in Thames Valley are more likely to be older than anywhere else in…
Read More
Breaking News

July’s HMRC Property Transactions Report

Headline statistics Headline statistics from the latest transactions data include: the provisional seasonally adjusted estimate of the number of UK residential transactions in July 2026 is 96,710, 1% lower than July 2025 and 2% lower than June 2026 the provisional non-seasonally adjusted estimate of the number of UK residential transactions in July 2026 is 106,620, 5% higher than July…
Read More
Breaking News

Almost half of homesellers hit by broken chains

The latest research from House Buyer Bureau has revealed that almost half of home sellers who form part of a property chain have seen that chain break during the sales process, with buyers changing their minds and pulling out by far the most common reason why.   House Buyer Bureau commissioned an independent survey of 1,072…
Read More
Social Housing 2019
Breaking News

Only 1 in 10 new-build homebuyers happy

Just 1 in 10 new-build buyers got the home they wanted before moving in   The latest research from UK Property Development (UKPD) has found that just 11% of people who purchased a new-build home in the past two years were able to personalise their property exactly as they wanted before moving in. As a…
Read More
Breaking News

One-third of tenant income in the UK goes on rent

Lomond’s Summer 2026 Quarterly Insights report reveals tenants now spend an average of 32.7% of their yearly income on rent UK average rents rise to £1,369pcm, increasing by +4.3% in the same period last year Average rent in London reaches £2,418pcm, 76% higher than the UK average The average age of renters across the UK is now 31.5   Lomond, the UK’s leading network of lettings and sales agents, has…
Read More
Finance

Six in 10 UK businesses look to adapt operations in response to extreme heat

37 per cent have increased heat-related investment, with 23 per cent considering it Cooling equipment, including air conditioning and ventilation, is the most common investment priority (28 per cent) Barclays anonymised client data shows that air conditioning suppliers saw cash inflows increase by 4.3 per cent year-on-year into Barclays accounts Consumers claim 25.1°C is their…
Read More