Can I Spray Japanese Knotweed?

Are you struggling with Japanese Knotweed and getting rid of it? Firstly, are you wondering “Can I spray Japanese Knotweed with a herbicial weed killer?” Therefore, Japanese Knotweed Expert are here to offer professional advice…

Can I Spray Japanese Knotweed?

Firstly, Japanese Knotweed is typically treated with a glyphosate-based spray. However, this is only available for trade entities to purchase, requiring a professional to carry this out.

Secondly, we strongly recommend that you ensure the professional you choose has (at a minimum) of the following qualifications. PA1, PA6 and PA6AW training licences – covering them to work with a wide variety of pesticides. Furthermore, this ensures safe handling and competency when spraying on land and near water.

Additionally meaning, that the herbicides used will not cause your garden, or any surrounding vegetation or water bodies, any harm.

PCA Chartered Surveyors

A PCA (Property Care Association) Chartered Surveyor in Japanese Knotweed (CSJK) should oversee this work. Resulting in insurance that the Japanese knotweed is correctly identified, along with any further stands or growths in the near vicinity, allowing appropriate management.

Moreover, should the Japanese knotweed spread or grow more aggressively than normal. A qualified surveyor can tailor your spraying program to limit growth without causing any further damage to your garden.

Herbicide Treatment

The most common and preferred treatment method is a herbicide treatment. The best time to spray Japanese knotweed is during the plant's active growth stage as the herbicide we use is a systemic translocating herbicide. The herbicide treatment is most efficient on a warm, sunny day.

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Our Herbicide

We treat the invasive weed by spraying it with a systemic translocating herbicide which is significantly stronger than herbicides available to the public. This kills both the top of the plant and the rhizome (root). If there are other plants in the area that need protecting then stem injection should be put into place.

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How Many Treatments are Necessary?

Typically, we would carry out three treatments within the first season and there are two further years of monitoring to ensure there is no re-growth. A total of nine visits is typical however more is sometimes necessary. We offer fixed pricing and all work is guaranteed!

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Insurance Backed Guarantee

In order to obtain an insurance backed guarantee once the treatment programme has been finished, you will need to have the work overseen by a PCA accredited company. This guarantees that any further growth within the insurance period is remedied as soon as is practicable.

Here, at Japanese Knotweed Expert, our surveyors are PCA Certified, so get in touch if you need any knotweed taken care of! To find out more about our qualifications, visit our Qualifications & Accreditations page