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« Lawn Care Tips for beating the Drought | Main | How to Control Weed Grasses in your Lawn »

Controlling Japanese Knotweed in your Garden

Grass Clippings - Japanese Knotweed ControlWhen you are involved with weed control, you will always get asked about a wide range of weeds that can appear in a garden, even though your specialist knowledge is really lawn weeds.

Being the helpful sort, we like to keep you up to date with all weed related matters and this technical post is about controlling Japanese Knotweed and provides some up to date news about this invasive weed.

The majority of homeowners instantly panic about JNW.  It is truly not hard to kill if you use a professional and licensed treatment company and don't be lured into expensive eradication concepts and programmes.  The initial treatment will mostly control it and the second treatment can pick up on any regrowth the next year or after six months after the first treatment.  The more you have, the more complicated eradication may become but small clumps are easily and quickly dealt with.



Weed Free, based in Woking, Surrey is one of these pesticide application service organisations who can help you and small home owner clumps will not break the budget.

Japanese knotweed is native to Japan, Taiwan and China, and was introduced to Europe as an ornamental plant in the early 19th century. It is a large vigorous weed that appears to have no natural enemies in Britain. It can colonise most habitats and is regarded as a troublesome pest in many parts of the country because of its rapid invasion and domination of habitats, which results in the exclusion of other plants. It can damage property (for example by growing through tarmac or even the floors of houses) and therefore needs to be cleared from development sites. The species also causes problems in terms of flood management. It increases the risk of riverbank erosion when the dense growth of the plant dies back in the autumn exposing bare soil. It can also create a flooding hazard if the dead stems are washed into the streams and clog up the channel. A fragment of root as small as 0.8 grams can grow to form a new plant.

If you are a land owner and you have Japanese Knotweed on your lawn or in your hedge lines, you must control the weed and also take adequate precautions in the disposal of the treated but dead vegetation so as to contain the spread of the weed. You can read more about eradication methods here.

The Environment Agency has drafted a Japanese Knotweed Code of Practice to help land and home owners who have the weed on their land.


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