Learn about home knotweed treatment
Discovering knotweed at home can be a shock, but you’ve made the right decision to treat it professionally. Find out what you can expect from the home knotweed treatment process.
If you have already attempted to remove knotweed from your garden you will know that this weed is determined to stay put. Whilst knotweed can be combated with the correct approach, it can be remarkably stubborn. We use many years of experience to target the weed in the right way to successfully eradicate it.
There are efficient and effective ways to combat this invasive plant, and this article is designed to get you well prepared for and familiar with the process of knotweed removal to make it as pain free as possible.
Why is knotweed so difficult to remove?
Due to its rapid growth, Japanese knotweed is a real challenge to remove. In the summer months it can grow up to 7ft, suppressing growth of many other plants around it. Knotweed reproduces from it’s rhizomes – these are lateral growing stems or roots that are found underground.
The plant can regrow even from the smallest part of rhizome, and one it grows it spreads fast! Considering the fact that knotweed is known to growth through cracks and joins in concrete it’s clear that this weed is a determined grower.
Home knotweed treatment
How do I get rid of knotweed in my garden?
Chemicals – One of the most common chemicals that are used for treating knotweed is glyphosate. This is a lengthy process, and not the best option if you want to be rid of this plant straight away.
The glyphosate is usually applied to the foliage, it is then passed within the plant to the rhizomes underground which store its energy for growth. In the winter we will usually cut away old stems to allow for good access to the foliage for spraying in summer time.
The best time to start this process is May, and the plant needs to be at least 90cm high. Approximately 2 months later we will treat the weed again, and the final treatment should take place in September, so that the plant begins to die down in the autumn.
If there is regrowth then this needs to be treated, and it is likely that this process will take many seasons. As a guideline, it can sometimes take three years of treatment before this weed is fully eradicated.
Digging – For a more immediate solution we can attempt to excavate. This clearly means it is removed from your garden straight away. However, the smallest piece of rhizome left will regrow, so don’t be surprised if this process also needs repeating season after season.
If clippings spread to a neighbour’s property, you could also be liable to legal action and face fines of up to £2,500.
Biological Control – More recently a biological form of controlling knotweed growth has been trialled on various sites across the UK. Although it is not yet available as a widespread treatment, a plant sucker – psyllid – is being released. The insect, Aphalara Itadori, feeds on the sap of knotweed, reducing the plant’s ability to grow and spread. Unfortunately this method is still in its trial stages, and not currently a viable option.
No matter which method of removal you choose, it is very important that invasive species are disposed of properly. Knotweed is classed as ‘Controlled Waste’ under the Environmental Protection Act of 1990, which means it cannot be disposed of in normal household waste.