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
Letting Agent Talk

Northern Ireland emerging as one of the UK’s most attractive long-term rental investments

Northern Ireland rents have increased by approximately 51% over the past five years Tenant enquiries have risen by approximately 33%, highlighting continued demand for quality rental accommodation. Four of the five fastest-growing housing markets in the UK are located in Northern Ireland 26% of landlords in England sold at least one rental property during 2024,…
Read More
Estate Agent Talk

Homebuyers demand same-day conveyancing updates

New research from Lyons Bowe solicitors reveals that Britain’s homebuyers have little tolerance for poor communication during the conveyancing process, with buyers increasingly expecting same-day updates, prompt responses, and swift notification of any issues that could impact their purchase. The survey of current and recent homebuyers who have purchased a property within the last two years,…
Read More
Breaking News

Breaking Property News 25/6/26

Daily bite-sized proptech and property news in partnership with Proptech-X.   Detecting property moisture defects without invasive or damaging procedures BEST Training, a specialist CPD provider for the built environment, has now launched Module 2 of its advanced course series: Investigating Moisture in Traditional Buildings. The module offers an end-to-end diagnostic curriculum for professionals working…
Read More
Breaking News

How Wimbledon property compares to other Grand Slam locations

The latest research from Benham and Reeves has revealed that property values in Wimbledon, home to the Wimbledon serves up more subdued house price growth than fellow Grand Slam locations The latest research from Benham and Reeves has revealed that property values in Wimbledon, home to the world’s most prestigious tennis tournament, have fallen by…
Read More
Breaking News

Interest rates matter, but asking price is still what sells a home

Homes priced right first time find a buyer in around five weeks, while overpriced homes take three months longer, and new LRG research shows what buyers are looking for. The Bank of England’s latest decision to hold interest rates is welcome news for buyers and sellers, providing greater stability and confidence for those considering a…
Read More
Tips when buying at property auctions
Breaking News

Three-bedroom homes dominate Britain’s quick-sale market

The latest industry insight from the House Buyer Bureau reveals that the East and West Midlands are Britain’s quick sale hotspots, with three-bedroom homes proving the most common property type when it comes to quick-sale activity. House Buyer Bureau’s internal data* shows that in 2025 the company had contact with, and made a firm offer…
Read More