What you should not do!
DO NOT
- Don’t cut it down / flail down Japanese as this could cause it to spread especially when the stem is growing as it can stimulate the root system to grow instead.
- Don’t try to dig up Japanese Knotweed as this will lead to a significant increase in stem density. Even a tiny fragment of the cut rhizome is capable of regeneration and when you are digging it up you run the risk of creating multiple new plants that will reappear with vengeance.
- Any soil that is obtained from ground within 7 m horizontally and 3 m deep of a Japanese knotweed plant could contain rhizome. Don’t spread soil contaminated with Japanese knotweed rhizome in as this will create a whole new problem.
- The rhizome is highly regenerative and will readily grow into new plants.
- Don’t machine Chip/Shred Japanese Knotweed material. Mechanical chippers will not kill Japanese Knotweed. If you spread the chipped material on soil, it is highly likely that Japanese knotweed could regrow.
- It is important that you don’t dump garden waste contaminated with Japanese knotweed in the countryside – you will be breaking the law under The Wildlife and Countryside Act 1981 (as amended).
- It is important that you don’t take Japanese knotweed to recycling centres that receive garden waste as it will contaminate the compost. Don’t break the law. Remember, if you cause Japanese knotweed to spread you are guilty of an offence under the Wildlife and Countryside Act (1981)
- Japanese knotweed, it is best to dispose of it on site by burning it. - Don’t cause the spread of Japanese knotweed stem and crowns. If you cut down Japanese knotweed, it is best to dispose of it on site.
Important Note: Don’t add Japanese Knotweed to compost. You will need to compost it separately (preferably on plastic sheeting to prevent rooting) so that you can be sure it is dead.
What To Do If You Think You Have Japanese Knotweed
This Is What You Should Be Doing
What To Do If You Think You Have Japanese, Giant, Bohemian and Himalayan Knotweed On or Near Your Property:
This is what you should do.
- Contact a professional who is qualified to treat and manage Invasive Weed Control and can deliver efficient, effective and reliable treatment plan.
- Do not ignore Japanese, Giant, Bohemian and Himalayan Knotweed or Himalayn Balsam when you see it in your garden, building plot, a neighbours garden or adjoining land.
- It can grow very quickly at a rate of 10cm a day and the costs will grow to treat the problem as the infestation spreads.
If you have an 'Invasive Plant Species' problem on your property. Don't delay getting in touch straight away, because you need a treatment plan putting into place.
Take Positive Action Straight Away
Treating these problems is not a quick process, but it doesn't need to be that expensive if you act sooner, rather than later.
'Mid Wales Invasive Plant Species Weed Control’ (MWIPSWC) / Jamie’s Garden Services is fully NPTC Qualified and Insured to supply Invasive Plant Species Weed Control Services to Commercial and Residential Customers.
To get a free quotation contact: 'Mid Wales Invasive Plant Species Weed Control’ (MWIPSWC) / Jamie’s Garden Services:
Knotweed Treatment & Monitoring Plans - What Are They?
A Treatment Plan For Knotweed Will Achieve The Following
A Treatment Plan for dealing with a Japanese, Giant, Bohemian or Himalayan Knotweed or any other invasive or harmful plant species will consist of the following.
1) You will have a site visit to identify, evaluate and document the extent of the problem.
2) The Treatment Plan will clearly set out what will need to be done to eradicate the
invasive plant species problem.
3) This will clearly set out:
Any Health and Safety Issues
When treatments will be undertaken.
What treatment process will be used.
When ongoing monitoring will happen.
What information will be feed back to you.
Advice will be given that will be relevant to the current situation at that time.
What will be involved in the ongoing monitoring and treatment.
4) It should be noted that a Treatment & Monitoring Plans are normally between 3 to 5 years.
This is set out as follows:
Year 1: Initially to Evaluate and set up initial treatments.
Year 2: Evaluate previous years treatments and effect further treatment on seasonal regrowth.
It should be noted that a marked reduction should be visible from the previous year.
Year 3: Evaluate previous years treatments and effect further treatment on seasonal regrowth.
It should be noted that a further marked reduction should be visible from the previous year
and there should be minimal regrowth or regeneration
Year 4: Evaluate previous years treatments and if necessary effect any further
treatment should there be any seasonal regrowth or regeneration
It should be noted that by stage generally it should only be down to monitoring.
Year 5: Evaluate previous years treatments if any were applied and if necessary effect any further
treatment should there be any seasonal regrowth or regeneration.
It should be noted that by stage generally it should only be down to monitoring.
It is important to remember that treatment can only be applied to what is above the ground and not what is below the ground. As Japanese, Giant, Bohemian or Himalayan Knotweed is spread through its hardy root system. It is possible that elements of that root system lay dormant and for no reason at all, can without any reason become active again. This is not a failure of the treatments that have been applied, as it is simply a characteristic of the plant species.
This is why the ongoing monitoring and documentation process is extremely important.
TREATMENT OPTIONS
Commercial Spraying
Direct Stem Injections
Direct Stem Injections
The most efficient treatment options for dealing with a Japanese, Giant, Bohemian or Himalayan Knotweed infestations is by spraying with a specially chosen herbicide at the correct time of the year. This needs to be done by a qualified person to ensure that the effective, and correct methods are undertaken to get maximum effect.
Direct Stem Injections
Direct Stem Injections
Direct Stem Injections
The most effective treatment option for dealing with a Japanese, Giant, Bohemian or Himalayan Knotweed infestation is by directly injecting the main stem of the knotweed with a specially chosen herbicide at the correct time of the year. This is especially beneficial when you don't want to damage other vegetation in the same area or for especially difficult and resistant stems.
Generally the spraying will be the start of the process to deal with an infestation and then injection will be a follow up.
This needs to be done by a qualified person to ensure that the effective, efficient and correct methods are undertaken to get maximum effect.