KILLING JAPANESE KNOTWEED

Herbicides, chemicals and excavation methods

JAPANESE KNOTWEED REMOVAL

Does Roundup kill Japanese Knotweed?

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What herbicide kills Japanese knotweed?

Japanese knotweed is susceptible to a range of herbicides including glyphosates, such as ‘Roundup biactive’ and ‘Glyphos biactive’. It is also susceptible to other chemicals like triclopyr and picloram. However, glyphosate is often the preferred choice for domestic use due to its suitability for use near water.

While herbicides are an effective means of killing Japanese Knotweed, they use should be limited to areas destined to become lawns or flower beds, do not use herbicides on areas that will one day become your vegetable garden.

What chemical will kill Japanese knotweed?

Glyphosate-based weed killers available from garden centres will all have a harmful effect on Japanese Knotweed. Glyphosate is often applied to the leaves, which the plant then takes down to the rhizomes. This is normally a slow process requiring at least three to four growing seasons to be effective, and fully eradicate the Japanese Knotweed. Professional Japanese Knotweed removal companies have access to more powerful herbicides which can reduce the removal process by half.

How do you get rid of knotweed?

The most common and economically effective means of removing Japanese Knotweed is herbicides. These may be applied to the leaves, which the plant then takes down into its roots, or in more environmentally-sensitive areas (when you do not wish to damage neighbouring plants), there is also the option for herbicide stem injections.

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, we ensure 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.

Can you burn 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 removal company.

Alternatives to removing Japanese Knotweed

Used purely as a means of halting the spread of Japanese Knotweed, we can also install a root barrier. 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.

Contact a professional Japanese Knotweed removal specialist

Removing 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 trouble plant but the problem is that even a 0.2 g 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.

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