Permanent Japanese knotweed removal is not easy based on its defiance nature to grow beyond any boundary and leave on its trail significant damage to the environment, property and buildings.

The following sections explain the methods one can consider using to achieve full eradication of this stubborn weed.

Excavation and landfill

This approach mainly involves the use of machines called excavators to unearth the Japanese knotweed together with its root system and, additionally dig up the infested soil and take it to a landfill zone that is specialist in the disposal of unwanted waste.

To achieve permanent Japanese knotweed removal using this method here is what you must do:

  1. Choose the proper equipment or tools – in cases where the Japanese knotweed has not yet developed fully meaning its root system is not deeply ingrained into the soil, you can choose to make do with home-based tools such as a shovel or a digging hoe to excavate the roots out of the soil. Where the weed plant is fully grown such that the roots run deep into the soil, you must make use of machines (excavators). The use of excavators poses some challenges including, the cost aspect attached to hiring such machines, the need to create access routes for the machines to reach the infested site and finally the possible damage to the land which may render it desolate if no efforts are put into place to restore it for future usage.
  2. Packaging – it is vital that the pieces of the Japanese knotweed that have been dug out together with the surrounding soil are put into packages or any suitable materials that are completely sealable to avoid any spills whilst the waste will be in transit to the landfill site. It is always advised that you should hire professional carrier services to do this job but if hard-pressed money-wise, nothing stops you from doing this by yourself.
  3. Licensed landfill – always ensure the intended landfill site for the final disposal of the waste material is authorized to handle such material. Do not just take it to any place and dump it. Also, as a matter of prudence, alert the concerned persons working at the landfill site early in advance to prepare to receive the waste.
Stockpile and treatment of rhizomes in a metal container prior to removal
Stockpile and treatment of rhizomes in a metal container allows for permanent Japanese knotweed removal

Herbicide Treatment

Basically, herbicides are chemical products that are industrially manufactured for the purpose of treatment of various weeds.

Most of these chemicals, including, the ones for treating Japanese knotweed have a non-restrictive use therefore even private property owners can readily purchase them from approved sellers within their locality.

To this end, the recommendable herbicides when it comes to treating Japanese knotweed are those that contain glyphosate an example being Roundup.

Herbicides are deemed to be effective in achieving permanent Japanese knotweed removal within a short time if applied properly. Accordingly, each herbicide has special guidelines for an application that must be followed for effective results.

Therefore, it is prudent that prior to using any herbicide you familiarize yourself with the rules of application.

Additionally, herbicides work better when the cases of the Japanese knotweed have been cut down such that the herbicides are sprayed directly into the remaining plant remnant that is ingrained in the soil.

However, there are cases where the herbicide is introduced to the plant through injection as a DIY method. Once you have applied the herbicide, you must give it a time frame of at least 7 days then start pulling out the decayed waste from the ground.

As a precautionary measure when using herbicides, it is always safe to ensure that you have put on protective gear; hand gloves and masks. Safety must be paramount, notwithstanding the type of herbicide chosen for the purpose of eliminating the invasive weed plant.

Bestseller No. 1
Scotts Miracle-Gro Roundup Tree Stump and Root Killer 250 ml Liquid Concentrate Weedkiller
  • Liquid concentrate tree stump and tough weed killer
  • Kills most garden weeds and tree stumps with a single application
  • Children and pets need not be excluded from treated areas (once dry)
  • Fully degrades in soil by microbial action
  • Leaves no harmful residues to allow replanting
Bestseller No. 2
Elixir Gardens 360 g/l Glyphosate Commercial Industrial Strength Weed Killer | Treats up to 3332 sq.m | Concentrated Herbicide/Weedkiller | 2 x 1 Litre Bottle + Measuring Cup & Gloves
  • Quickly & effectively clears areas of weeds and unwanted vegetation.
  • Super concentrated 360 gram/litre Glyphosate formula. DILUTION REQUIRED. Kills & eliminates weeds at the root.
  • 2 litres treats up to 3332 sq. meters.
  • Perfect for a range of hard surfaces such as patios, decking, aggregates and driveways.
  • PLEASE NOTE: Depending on the type of weed and climate, please allow up to 7 days to see the effects of the treatment. Some weeds may take up to 4 weeks for the weedkiller to take effect.
SaleBestseller No. 3
Roundup Tree Stump Weedkiller, Super Concentrate 250 ml
  • Kills ivy japanese knotweed, saplings, brambles and nettles to the root
  • Kills up to 16 tree stumps
  • Contains a reusable pipette for specialist treatment of japanese knotweed
  • Kills the roots so weeds don't come back
  • Degraded in the soil by micro organisms

You must also carry out due diligence in terms of identifying the extent of damage that can be caused as a result of using the herbicide within a certain location, for instance, if there is a water body within or the presence of public water piping systems, you must refrain from using the herbicide in such an area or use them with extreme caution.

If the herbicide is to be used within a neighbourhood that has animals and children in plenty, you must put in place measures to protect them against any adverse effects of the herbicide, for instance, you may request that they do not play near the sprayed locale at least until the chemical has cleared.

Using herbicides effectively adds to the list of methods that can aid you in permanent Japanese knotweed removal for good.

Japanese knotweed treatment via spraying glysophate chemicals
Permanent Japanese knotweed removal via spraying Glysophate chemicals

Burning Japanese knotweed

Burning as a method of permanent Japanese knotweed removal has been hailed as one of the most effective approaches to eradicating the weed if done following the right steps.

After the very first step of cutting the canes of the Japanese knotweed has happened, for a person intending to burn the invasive weed, the following steps should be taken:

  1. Complete drying of the cane and any fragment is meant to derive the weed of moisture.
  2. Use an incinerator with high temperatures so that the weed is subjected to high heat to ensure no rhizome survives the process.
  3. Transportation and disposal – the burnt substance must be transported in enclosed containers to avoid any spillage along the way. Preferably, an authorized carrier should be contacted to do this. It is important to note that no other waste materials should be carried together with the burnt weed.
  4. The burnt substance of the remains of the Japanese knotweed must be disposed of in an authorized landfill site that has the capacity to do so. Such substances should not be dumped anywhere as this may pose the risk of having a re-growth.
How to get rid of Japanese knotweed by burning it to ash
Permanent Japanese knotweed removal by burning it to ash

Cut and dispel

Cutting as a permanent Japanese knotweed removal approach has been hailed as an effective method directed toward the eradication of this weed, especially where the plants are overgrown.

However, for cutting to work perfectly, it must be done using very sharp objects that can cut the canes of the weed as close to the ground as possible.

While cutting one must be very careful to ensure that the fragments of the branches or rhizomes do not spread as this may lead to a new infestation.

Additionally, cutting is an exercise that must be done within a certain time frame because the Japanese knotweed tends to rapidly regenerate. 

When it comes to dispelling the cut remains of the Japanese knotweed, this has to be done professionally. For instance, where the remains are to be buried, you must ensure that they are taken to a site that is authorized to do so.

Want to know more about permanent Japanese knotweed removal?

Knotweed Removal aims to provide the most up-to-date information, help and advice for YOU to make informed decisions. If you are unsure or uncertain about how to proceed, please reach out to us and we will gladly come back and advise you as best we can.

Governmental advice can be found here and the UK law covering the removal of Japanese Knotweed as stated under the Wildlife and Countryside Act 1981 can be found here.

The best means to contact us is via our email –

Do not forget we have a library of blogs covering many areas relevant to Japanese Knotweed, our free downloadable How-to Guides and Product Reviews on the latest methods being employed to eradicate or remove Japanese Knotweed.

Knotweed Removal, UK

Bestseller No. 1
Rootblast | Super Strength Concentrated Total Weed Killer - Super Strength Glyphosate for Effective Weed Control - Kills Weeds down to the their roots (1 x 1L)
  • CONCENTRATED FORMULA: Rootblast weed killer is a powerful solution that comes in a concentrated form, making it highly effective at killing weeds down to the roots.
  • SUPER STRENGTH GLYPHOSATE: With a high concentration of glyphosate, Rootblast provides effective control over a wide range of weeds, including tough-to-kill perennial weeds.
  • KILLS WEEDS AT THE ROOT: Unlike other weed killers that only target the leaves of weeds, Rootblast penetrates deep into the soil to kill weeds at the root, preventing them from growing back.
  • EASY TO USE: Simply dilute Rootblast with water according to the instructions and apply to the affected areas with a sprayer for quick and easy application.
  • LARGE COVERAGE AREA: One 1L bottle of Rootblast can cover up to 1,666 square meters of land, making it a cost-effective solution for large gardens and properties. Choose Rootblast for powerful weed control and a weed-free garden all year round.
Bestseller No. 2
Bayer Garden 2 x Path, Patio & Drive Weed Killer - 3 x 8g Sachets per pack treats upto 75sqm - Kills Ground Elder, Nettles, Docks, Couch Grass & Japanese Knotweed.
  • Ideal for clearing weeds from paths, patios and rives including areas of tarmac, concrete and block paving.
  • Kills tough weeds and their roots including: Ground Elder, Nettles, Docks, Couch Grass, Japanese Knotweed, Brambles, Bracken & Ivy.
  • Each box contains 3 x 8g Simple ready measured soluble doses and treats up to 75sqm.
  • Apply at any time when weeds are showing green leaf and are actively growing.
  • Keep children and pets away from treated areas until the spray has dried.
SaleBestseller No. 3
Roundup Tree Stump Weedkiller, Super Concentrate 250 ml
  • Kills ivy japanese knotweed, saplings, brambles and nettles to the root
  • Kills up to 16 tree stumps
  • Contains a reusable pipette for specialist treatment of japanese knotweed
  • Kills the roots so weeds don't come back
  • Degraded in the soil by micro organisms
Bestseller No. 4
RootBlast - RootBlast 360 Glyphosate Home Garden Weedkiller - 1L Bottle with Integral Measuring Device Pair - Includes Pair Of gloves - 1L Makes Up to 50L
  • WEED KILLER CONCENTRATE: Rootblast's strong weed killer is both super-concentrated and tough on most broad leaf and grass weeds. It's specifically designed to bring you the best results by using systematic herbicide technology. It targets weeds from the inside and kills them at their underlying roots, preventing any future growth
  • GLYPHOSATE WEED KILLER: For optimal weed control, Rootblast have created a concentrate weed killer that contains 360g/l of glyphosate. Glyphosate is a broad-spectrum systemic herbicide and crop desiccant that is used by famers. It kills and destroys the weed without affecting the crop. By using glyphosate, Rootblast's weed killer is stronger and more effective than most other weed killers on the market
  • GLYPHOSATE HERBICIDE: This powerful and effective weed killer is designed to target weeds such as dandelion, grasses, docks, nettles, willowherb, bindweed, woody brambles, tree stumps, ivy and more. After applying Rootblast's heavy duty weed killer, the first signs of weed control are visible when the weed leaves yellow - this can take anywhere from a few days to up to 2-4 weeks. From this 1 litre bottle of glyphosate herbicide concentrate, you can make up 50 litres of product when it's diluted
  • DOCK, GRASS & DANDELION KILLER: Alongside this industrial strength weed killer, you'll receive a pair of protective gloves as well as the integral measuring device attached to the bottle. The gloves provide you with protection to ensure your experience is as easy and safe as possible. The integral measuring device is an inbuilt measuring cup, simply remove cap and carefully squeeze the container until the cup is full
  • TOTAL PROTECT WEED GARDEN SPRAY: This easy to use product is available as a ready to use tough, concentrated weed killer that comes with a integral measuring device attached and protective gloves. Use by professional garden and farmers, this product can tackle your weed problem and kill the weed from the root - the ultimate weed killer!
Bestseller No. 5
Rootblast Glyphosate Weedkiller 4 x 100ml Concentrate with 5L Pump Sprayer
  • For use on unwanted vegetation and areas not intended to bear vegetation
  • Contains 72 g/l glyphosate for effective control of annual and deep-rooted perennial garden weeds, including grasses*, docks, nettles, willowherb, dandelion and bindweed. Also suitable for woody brambles, tree stumps and Ivy.
  • Coverage up to 66sqm per sachet

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