Killing Japanese knotweed
When it comes to killing Japanese knotweed, treatment and eradication can be a tough task – but it is possible with commitment.
Herbicide spraying is a popular treatment for eradicating Japanese knotweed. However, it’s important to know that herbicide will kill most of the plant, but it doesn’t get rid of the plant’s rhizomes in the ground. This means that future re-growth is technically possible if not managed.
Repetitive, yearly applications of herbicide can prevent the spread and growth of Japanese knotweed, but if you want the knotweed’s rhizomes (roots) completely removed from the soil – excavation is required. This is the way to ensure complete Japanese knotweed removal.
Herbicides that Kill Japanese Knotweed
Does Roundup kill Japanese knotweed?
Roundup, Gallup, Landmaster, Pondmaster, Ranger, Rodeo, and Touchdown are all herbicides recommended to kill Japanese Knotweed. They are all glyphosate-based herbicides and will kill the troublesome weed.
The best time to spray the leaves of Japanese Knotweed with herbicide is late summer or early autumn. This is the period in which the plant is flowering and so the foliage conducts more nutrients to the rhizome to build food reserves.
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Stop trying to kill Japanese knotweed yourself!
Did you know knotweed can regrow with only a thumbnail’s worth (around 0.2g) of its root system left in the soil?
We can help provide a solution that lasts.
Other Viable Options for Killing Japanese Knotweed
Burning Japanese knotweed
Once Japanese knotweed has been removed it can be burned on your own land, but you will first need to let it dry out thoroughly. However, even after burning Japanese knotweed, the rhizomes may still be active and are capable of growing a full plant when they next come into contact with soil and water. For this reason, even after burning, you will need to contact a professional Japanese knotweed eradication company.
In more environmentally-sensitive areas (when you do not wish to damage neighbouring plants), there is also the option for herbicide stem injections instead of herbicide spraying. This treatment method is often chosen on residential projects due to the precise nature of the application.
There are also cases where a more immediate removal strategy is required. In these instances, the best option is a Japanese knotweed excavation. By digging up the infected area, it’s ensured that any trace of Japanese knotweed is removed. This is essential since even the tiniest fragment of rhizome left in the soil can regrow. Excavation is the only available removal technique if the land in question is to be used for future development purposes.
Important Information Regarding Knotweed Disposal
When it comes to the excavation and disposal of Japanese knotweed, a licenced waste carrier, such as Japanese Knotweed Specialists, must be used as knotweed is a controlled substance.
Alternatives to Removing Japanese Knotweed
Root barriers to prevent spreading
Used purely as a means of halting the spread of Japanese knotweed, the installation of a root barrier is an option. This impenetrable barrier goes down three metres (Japanese knotweed roots go down just over two) and therefore stops the plant spreading into any neighbouring lands. The Japanese knotweed root system (rhizome) cannot grow through the root barrier and thus the infestation is completely contained.
Japanese Knotweed and The Law
From the Anti-social behaviour, Crime and Policing Act 2014 to Hazardous Waste Regulations 2005, there are multiple acts here in the UK that mandate the treatment of Japanese knotweed.
While it is not illegal to have Japanese knotweed present on your land, it is an offence to let it grow knowingly to neighbouring lands according to the Wildlife and Countryside Act 1981. Failing to eradicate Japanese knotweed and letting it spread from your land may land you a fine of £5,000 or even a prison sentence.
Don’t get caught out. Ensure you fully eradicate Japanese knotweed to avoid costly fines or worse.
Contact a professional Japanese Knotweed Removal Specialist
Eradicating Japanese knotweed is a difficult process and can take a long time to complete. We normally suggest about two years – four whole growing seasons to be sure. Some people take it on themselves to remove this troublesome plant, but the problem is that even a 0.2g fragment of Japanese knotweed rhizome can regrow – leaving you back where you were at the start.
The best way to ensure a complete, thorough and lasting eradication is to contact a professional Japanese knotweed removal company like Japanese Knotweed Specialists.