Japanese Knotweed Roots Reset Treatment

Roots Reset offers a proven and natural solution for the comprehensive management of invasive species, including Japanese knotweed.

This is the first method where Japanese Knotweed can be completely eliminated within one growing season, without having to remove soil.

SoilWise partnership

Japanese Knotweed Specialists working in partnership with Soilwise are now able to offer a proven effective method for the complete and natural control of invasives such as Japanese knotweed by Root Reset .

The added value of Root Reset is two fold. By enriching the soil with our plant-based product CleaRoot and then covering it oxygen-tight, the roots of the harmful invasives break down.

At the same time, the biodiversity of the soil recovers. Once the Root Reset is complete, you can immediately apply new plantings.

Root Reset is patented and we deploy this method of work in close cooperation with  landowners and developers, local authorities, railway network, ports, water boards and construction companies.

In recent years Soilwise has succeeded with Root Reset in completely controlling invasives at more than 200 sites in north-western Europe.


  • Proven complete control of Japanese knotweed in one treatment
  • Environmentally friendly, no chemicals, and no intensive use of energy
  • Recovery of soil health and biodiversity above and below ground
  • Easy to apply, no excavation and removal of large amounts of soil required
  • Lower costs compared to some other methods
  • Specific approach possible for almost every situation, both in-situ and in-depot

How does it work?

Through Root Reset, the soil is first enriched with our CleaRoot granulate, followed by covering the soil oxygen-tight.

CleaRoot feeds specific microbes already present in the soil. As a result, these microbes grow rapidly and consume all the available oxygen in the soil.

Within two days, the oxygen level has dropped to less than one percent. In the absence of oxygen, further fermentation takes place. This process is harmful to the roots of invasives; the roots die.

Root Reset increases the biodiversity of beneficial microbes in the soil. This makes the soil vital again and resilient for healthy growth of new plantings without the presence of invasives.


Our CleaRoot granulate is a unique and all-natural plant-based mix. CleaRoot is free of contaminants, pathogens, additives, and genetically modified organisms (GMOs). It contains no living organisms.

The production of CleaRoot follows a standard biotechnological process, assuring consistent quality as well as being safe for humans and the environment.

  • Complete control of Japanese knotweed and other invasives
  • Root Reset eliminates invasives such as Asian knotweed (with Japanese with Japanese knotweed being the most common species in this family).

Japanese knotweed (Reynoutria japonica) was brought to Europe from Asia almost 200 years ago and is one of the most invasive exotic species.

Sakhalin and Bohemian knotweed are also common. Once this plant establishes itself somewhere, you won’t get rid of it easily.

Due to its strong growing power, Japanese knotweed displaces native plant species and is thus disastrous for biodiversity.

Its invasive root system can even damage buildings, pipes, and roads. Japanese knotweed is therefore a serious problem and experts see few practical methods of control.

Practical Application of Root Reset

Root Reset can be applied on site where Japanese knotweed or other invasives are growing, but is also suitable for stored soil in depot that is infested with invasives.

We have a tailored approach for each situation, but in general, our Root Reset method follows the following steps:

  • Removal of above-ground plant parts by mowing-suction combination
  • Milling the soil to shred the top layer of roots
  • Spreading the CleaRoot granulate on the ground
  • Mixing the CleaRoot-granulate into the ground by deep spading
  • Covering the soil with an oxygen-tight barrier
  • Planting new greenery after removing the oxygen barrier when the Root Reset process is finished

Where can Root reset Be used?

Root Reset is suitable for all kinds of locations, such as slopes, water edges, and along roads, and places where there are many cables and pipes in the ground. Trees are not an obstacle either, though a limited distance must be observed.

Especially in the first phases of the Root Reset process, a somewhat higher temperature of the soil is needed. The start is therefore usually between late April and mid-October.

The process takes six to ten months, at least six of which are during the warmer period of the year.

A major advantage of Root Reset is the need to be on-site a maximum of twice: when the system is installed and when it is removed.

This saves time and costs for the customer and also minimizes the impact on the environment.

We apply the Root Reset method in close cooperation with green space contractors.

Root Reset for soil in depot

Root Reset also works very well against invasive-infested soil in depot. First, the CleaRoot granulate is mixed into the soil with special machinery.

Then the soil is covered with an oxygen-tight layer and the whole thing is left in place for up to six months. After this period, the oxygen-tight cover can be removed and the soil will be free

Our Process






Planting new greenery