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Japanese Knotweed growing in your garden, can cause major problems, not only to your own garden and property, but to neighbours gardens and properties. In this article, I will explain;
What is Japanese Knotweed.
How to recognise Japanese Knotweed
How does Japanese Knotweed spread?
My way is to use Glyphosate weed killer.
This is the most effective way to kill and get rid of Japanese Knotweed I know and it is the method I use. It will require repeated doses to completely get rid of it and may take a few seasons. (The alternative is a complete excavation of the soil discussed below).
I apply it directly to the plant by painting it onto the leaves and the cut end of the stem. The glyphosate is taken in by the plant to the roots (rhizomes) and kills the whole plant and root (rhizomes).
You could try the branded stuff, like Roundup, but it is more expensive and really does not work as well as the undiluted Glyphosate I use.
This is how to use the glyphosate method.
Always check Strength actually is 360g/l when buying Glyphosate weed-killer from other sources.
The Wildlife and Countryside Act 1981 says, it is an offence to plant or grow Japanese knotweed where there is any risk of causing the plant to spread into the wild or neighbouring properties.
It also states that it is up to you the householder to control the plants from spreading. It is also illegal to dispose of Japanese Knotweed incorrectly, causing further spreading. I have included safe and legal ways of disposal on this page.
If you see Japanese knotweed growing in neighbouring gardens or on council property, try explaining to your neighbour, the potential damage to the countryside and property this will cause if left untreated. If reason fails or you spot Japanese Knotweed growing wild, the police have a wildlife liaison officer who can be contacted.
The Wildlife and Countryside Act 1981 says, it is an offence to plant or grow Japanese knotweed where there is any risk of causing the plant to spread into the wild or neighbouring properties.
It also states that it is up to you the householder to control the plants from spreading. It is also illegal to dispose of Japanese Knotweed incorrectly, causing further spreading. I have included safe and legal ways of disposal on this page.
If you see Japanese knotweed growing in neighbouring gardens or on council property, try explaining to your neighbour, the potential damage to the countryside and property this will cause if left untreated. If reason fails or you spot Japanese Knotweed growing wild, the police have a wildlife liaison officer who can be contacted.
When I'm treating Japanese Knotweed, I use this the
Strongest Weed killer Available in the U.K. For Uncertified Use. Contains 360 g/l glyphosate. The same as most Professional Grade Herbicides.
One Litre Treats Over 0.4 of an Acre Offering the Best Value
weedkiller Available rather than the branded sprays, it is a lot cheaper and a lot more effective. Click the picture for more info.
Always check Strength actually is 360g/l when buying Hi-Aktiv Glyphosate weed-killer from other sources.
Finally a few precautions when dealing with an infestation of Japanese Knotweed.
Latest news about Japanese Knotweed.
People who fail to control the spread of invasive non-native plants such as Japanese Knotweed could be fined or receive anti-social behaviour orders (Asbos), the government says.
The weed is one of the most destructive plants in the UK.
The new rules mean people can now be fined up to £2,500 for failing to control it.
And companies who fall foul of the law can be fined up to £20,000.
The Home Office says these plants threaten the UK's biodiversity by crowding out native species and destabilising riverbanks. They can also do immense harm to forestry, farms, roads and buildings.
Japanese knotweed can grow through tarmac and cause structural damage to properties,
Japanese knotweed is particularly difficult to eradicate. It is very resilient and regrows vigorously after being cut down.
The most effective method of eradicating it is by using glyphosate in the growing season.