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

Letting Agent Talk

Advice for London landlords and tenants ahead of the Renters’ Rights Act implementation

Phase one of the Renters’ Rights Act (RRA) comes into force on 1 May 2026, and with it brings about the most significant overhaul of the private rental sector in a generation. While the Act will see new responsibilities introduced, it will also offer an opportunity for landlords to strengthen their practices with a clear…
Read More
Estate Agent Talk

Budget-friendly ways to boost your chances of a successful spring house sale

With many households feeling the pressure of changing global economic conditions, tighter finances, and the high costs associated with moving, such as Stamp Duty, legal fees and removals, selling a home can currently feel like challenge. At the same time, spring traditionally brings a surge in buyer activity. Longer days and better weather tend to encourage more viewings,…
Read More
Letting Agent Talk

Expert Reacts To Renters’ Rights Act Ahead of Changes This Week

The Renters’ Rights Act comes into force this week (1st May), introducing major reforms to tenancy structures, eviction rules, and tenant protections across England. The changes will reshape how landlords manage properties and how tenants experience private renting, with significant implications for student private rentals and the wider rental market. Ahead of implementation, Owen Dixon,…
Read More
Breaking News

52% of buyers are cash purchasers – and they’re ready to move

New research from LRG reveals that sellers entering the spring market are meeting an unusually large pool of cash-ready buyers, many of whom aren’t constrained by affordability, but by a lack of suitable homes. According to LRG’s Spring 2026 Sales Report, based on a survey of 307 buyers and sellers across England and Wales, more than…
Read More
for sale sign london
Breaking News

Landlords sell up as Renters’ Rights prove final straw

Leading Kent and London law firm Thackray Williams have had a wave of last-minute instructions from landlords looking to sell their portfolios ahead of the Renters’ Rights Act coming into force this Friday. The litigation team has been instructed to seek possession by landlords wishing to sell their entire buy-to-let portfolios, as well as last-minute…
Read More
Breaking News

Breaking Property News 27/4/26

Daily bite-sized proptech and property news in partnership with Proptech-X. Will AI change the way we search on property portals? Thought Leadership by Andrew Stanton, CEO Proptech-PR Rightmove: the UK’s most profitable proptech Rightmove is widely seen as the UK’s most profitable proptech, generating £300m+ annually with operating margins around 70%. Even with slight recent…
Read More