Japanese Knotweed Removal Back to Services

Japanese Knotweed Removal

We treat infested areas and control the spread of Japanese Knotweed.

We are fully compliant with the CRD (Chemicals Regulation Directorate). Get advice from NPTC PA1/PA6 approved specialists.
Learn how you can protect your boundaries. Avoid facing legal action.

What is Japanese Knotweed?

Once considered an ‘ornament of beauty‘ by botanists in the 1800’s, would you believe this foreign species is currently costing the UK over £150m to treat every year?

Here’s why you need to be in the know:

Landowners can face legal action. Yes, Japanese Knotweed has become a problem to such a degree that the Home Office passed a Reform of antisocial behavioural powers so that they can issue community notices and penalties under the Anti-social Behaviour, Crime and Policing Act 2014 to avoid the spread of such invasive ‘non-native‘ plants that cause damage. (Indeed…they realised it’d cost over £180 billion pounds to erradicate it out of the UK so are doing their darndest to educate the public domain and put responsibility on landowners instead.)

Should I worry?

You ought to become aware simply because, if you have Japanese Knotweed on your land and allow it to grow across your neighbour’s property you could very well be prosecuted. The penalties aren’t altogether light.

& here’s why:

Imagine if left untreated what this little innocent ornament could do to a houses’ foundations…never mind the sewers, roads or drainage systems!

At its most prolific rate, Japanese Knotweed will grow lots (up to 20cm a day) – but that’s just surface level.

Underneath the soil is a different story.

The plants roots:-

  • anchor in 3 metres deep.
  • are capable of penetrating concrete.
  • can spread further than 7+ meters wide under ground.

It’s a sly one because in the winter months this rugged spreader dies back seemingly dormant and can easily go unnoticed, whilst under ground it’s energy stores throb with life as the beast grows within.

This is exactly how it’s evolved to survive volcanic ash in its native environment. Then, guess what? In summer you witness it rear it’s ugly stems again only to realise you’re twigging answers to your property subsidence issues.

What should I do?

If you think you have Japanese Knotweed on your property then do your research…quick! We can always help you identify and diagnose the extent of the issue and let you know the prognosis.

Moving in to a new property?

  • Check your mortgage lending agreement.

Mortgage lenders have the right and have in cases refused mortgages in instances that the property or surrounding buildings have been plagued with Japanese Knotweed.

Best case scenario is: IF it is spotted in a property survey then the lender will pretty much insist that you hire a specialist to takle the problem before they grant anything.


Already a landowner?

  • Check your building insurance.

Would you believe that (most) building insurers won’t provide insurance cover for non native invasive plants like Japanese Knotweed?  Check those clauses with a fine toothcombe. They’re not daft!


Classified as ‘Controlled Waste’

It’s more than advisable for you to hire specialist Japanese Knotweed removal services.
For 2 main reasons:

  1. If even under a gram of root remains untouched / untreated the plant can easily begin to take hold again. All roots need to fully absorb poisonous chemical compounds such as Glyphosate and be killed off entirely.
  2. Under the Environmental Protection Act 1990, Japanese Knotweed is considered a controlled waste that can only be disposed of in licenced landfill sites. Check the Environmental Agency’s register to locate one.

So don’t even dream about letting this specimen get cosy and engulf the same space as your green waste!


In the meantime, if you’re doing your own research here’s what Defra offer to help you identify things, but remember if you’re unsure we’re always on the other end of the line willing to help.

  • Fleshy red tinged shoots when it first breaks through the ground.
  • Large, heart or spade-shaped green leave.
  • Leaves arranged in a zig-zag pattern along the stem.
  • A hollow stem, like bamboo.
  • Dense clumps that can be several metres deep/
  • Clusters of cream flowers towards the end of July that attract bees.
  • Dies back between September and November, leaving brown stems.

We’re specialists in treating Japanese Knotweed

If it concerns you that you need help identifying something that looks like this and you may have this on your land, or you wish to discuss the options you have, please feel free to contact Robin at Wychwood Forestry Tree Surgeons on the number below.


Useful resources:

The Environment Agency’s Code of Practice: ‘Managing Japanese Knotweed

Prevent Japanese knotweed from spreading

Complaint form:  infestation of injurious weeds






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Harrogate, HG3 5JU

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