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When is the Time to Apply Knotweed Herbicides?

When planning to treat your Japanese Knotweed infestation, you should ideally begin herbicide treatment with a professional knotweed removal specialist when the plant is in full bloom. The best time for the bloom is right now before the summer ends and the colder months start to appear.

How Treatment Works

Herbicide is a glyphosate-based liquid that professionals spray onto Japanese Knotweed leaves. The invasive weed will drink the herbicide into its vines, stems and roots, spreading the poison across the full plant network and killing it.

There are also the options of herbicide stem injections, ideal for more sensitive environments where damage to neighbouring flora and fauna needs to be kept to a minimum. Although you can begin spraying around June for the best effect, the ideal time is towards the end of the summer and the beginning of Autumn. During this time, Japanese Knotweed is in full bloom and the foliage absorbs the treatment more effectively deep into its root system.

Like other garden weeds, Japanese Knotweed is more susceptible to treatment in warmer months, allowing the surface area to absorb the weed killer and having less rain to dilute the herbicide.

What Season is Bad for Removal of Japanese Knotweed

Any gardener will tell you that timing is everything when it comes to applying weed-killing agents. Japanese Knotweed treatment is no exception.

Herbicide treatment needs to be conducted at optimal times to deliver the maximum intended impact. The worst time to begin any treatment for Japanese Knotweed is when winter hits around late Autumn. That continues into the early Spring season when impact will be at its lowest.

In our extensive experience dealing with large and small Knotweed infestations, we can confidently tell you that Japanese Knotweed removal in Manchester conducted out of season will likely cause more harm than good. When you disturb Japanese Knotweed, fragments will chip away and spread – especially if the plant has frozen in the winter months.

Once these pesky plants shed fragments into the ground, the spread will begin infecting fresh areas of the garden, resulting in one or two more offshoots and extensive treatment in the Spring to kill them off again.

The Time is Now

Japanese Knotweed is ideally treated during the summer months up to early Autumn, or sooner. If you leave things too late, you will find yourself waiting up to 5 months before you can effectively begin treatment via a reputable Japanese Knotweed Manchester company.

Contact Solutions for Japanese Knotweed today to begin before it’s too late in getting rid of the problem for good.