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When it comes to the treatment of Japanese knotweed, there are a number of options to consider. The two most popular choices, however, are those of excavation and herbicide application.

Now, we know excavation may sound a little scary but we can assure you that your whole garden isn't going to be ripped to pieces. Regardless, the thought of having a digger on or around your property tearing away at the ground can be somewhat offputting, therefore herbicide application is often the go-to choice for many homeowners.

One of the many discussed treatments is glyphosate, an active ingredient in many herbicides. But does glyphosate kill Japnese knotweed off completely? Let's find out...

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winter garden

 If you read our blog "When is the Best Time to Treat Japanese Knotweed?" you'll know that the plant prepares to die back in the autumn months by moving all its nutrients down into its rhizomes. Introducing the herbicide at this critical point in the weed's lifecycle will help ensure it doesn't re-emerge again in Spring.

But what does Japanese knotweed look like in winter? Well, like most plants, when the temperature in your garden plummets, they die back for the winter. Plants with rhizome systems like Japanese knotweed will preserve their energy and survive under the soil until more favourable conditions return. 

As for the plant you see above the surface, it becomes dry, brittle and brown. The stalks which were once red and purple and full of leaves have turned woody and bamboo-like. The canes are hollow and will collapse around each other as they die. If the area hasn't been treated until this point, you can't guarantee that the knotweed won't come back stronger in a few months time. That's why swift Japanese knotweed treatment is always recommended.

More on Japanese Knotweed Identification >

What should I do if I suspect I have a knotweed problem?

Whether you spot Japanese knotweed on your property is spring, summer or winter, it's vital that you get in touch with a professional removal company right away. You CANNOT rely on the winter months to take care of the knotweed problem for you. 

We can survey your garden free of charge to find out if the plant you've spotted is actually Japanese knotweed. If it is, we'll be able to offer you a quotation for thorough removal, meaning the knotweed won't have a chance to spread around your property further. 

Request a FREE Japanese Knotweed Survey >

If you have any questions about identifying Japanese knotweed, or if you'd like to speak to our team about treatment. Email us at sales@taylortwc.co.uk or call us on 029 2039 7554.

 

In an attempt to control the rapid spread of Japanese knotweed in Holland, the Dutch government has issued an exemption to alien species ban.

Image: Pixabay

The once-celebrated plant that has now turned into one of destruction is causing huge problems within Holland, and as a result, five thousand Japanese leaf fleas have been released in a last-ditch attempt to control it. Japanese knotweed within the country has become an increasingly problematic issue, which has begun to threaten local biodiversities, damage water quality and increase risks of floods. As a result, the government took the unusual decision to issue an exemption on a ban on the introduction of alien species as the spiralling costs related to knotweed damage started to mount. 

Japanese knotweed is causing huge amounts of damage within the Dutch capital, particularly to pavements, building foundations and dykes, leading to millions of euros in costs each year. According to tests, leaf fleas carry the ability to kill young shoots, preventing the plant from growing by sucking up its sap. This has resulted in an initial 5,000 fleas being released in three distinct locations in hope of combatting the rising problem. It is hoped that the fleas will successfully hibernate over the winter and establish themselves within the new year with further specimens planned to be released next spring.

 

Knotweed in the Netherlands

Japanese knotweed was introduced and cultivated as an ornamental plant in the Netherlands between 1829 and 1841 by German botanist Phillip Franz von Siebold. Its aggressive root system, which has the ability to grow up to 20cm per day and breakthrough concrete, has caused major issues in many countries across Europe. Previously, the Dutch capital has attempted to control the spread of knotweed through means of hot water, fire and lasers but through no avail. The government is now playing its hopes on the colony of leaf fleas to curb the damage being caused. 

One of the leading entomologists at the Institute of Biology in Leiden, Suzanne Lommen who is coordinating the trial, says "All sorts of things have been tried, but complete pest control is extremely difficult and very expensive. We will have to combine various methods to get the Asian knotweed under control. We know from the Japanese knotweed psyllid that it can kill young shoots and slow down or even stop the growth of the plant by sucking up sap – nutrition – from the plant.

“If the psyllid can establish, reproduce and spread, and do the damage we see in the breeding trials, it can hopefully inhibit the growth and spread of Asian knotweed. Then you have a very cheap and environmentally-friendly solution with many years of effect that you can combine with the more expensive methods.”

Lommen continues by stating that the fleas may not take to the Dutch climate, saying "What we do not know yet is how the psyllid will thrive in the Netherlands,” she said. “It comes from an area in Japan where the climate most resembles that of the Netherlands. In the laboratory, it thrives on the interbreed knotweed that grows here. But reality will show whether it can survive in our country.”

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For more updates regarding Japanese knotweed in the UK and around the world, be sure to keep an eye on Taylor Total Weed Control's Twitter and Facebook accounts.

Our Japanese Knotweed Services >

Is Japanese knotweed poisonous?

SHORT ANSWER: No, Japanese knotweed is not poisonous. In fact, the plant can make a tasty and nutritious addition to all sorts of different recipes!

Japanese knotweed is a troublesome plant that causes a lot of problems here in the UK. It grows very quickly, it can cause damage as it spreads, and if there's Japanese knotweed in your garden, you may find it difficult to sell your property.

Still, knotweed's not all bad. Unlike some other invasive plants (such as giant hogweed, whose sap can cause severe skin inflammation), Japanese knotweed is not directly harmful to humans - you can actually cook it and eat it with no ill effect.

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As homeowners up and down the country are becoming more aware of the damage that can be caused to their properties as a result of a Japanese knotweed infestation, it is becoming an increasingly dreaded sight.

Initially embraced by Victorian gardeners for its beauty, Japanese knotweed quickly became an invasive presence that threatens to damage micro-ecosystems, roads and properties. But is knotweed really that bad? Let's take a look at some of the facts:

  • Knotweed can grow up to 10cm per day during peak season
  • Eradicating knotweed is very difficult on your own and requires professional help to avoid the risk of further spread
  • Its spread and growth in the UK has caused house and land prices to fall as much as 40% 

From these facts alone, you can see why so many homeowners in the UK are fearful of a knotweed infestation on or around their property. One way to limit the risk of an infestation is to try to prevent the spread of knotweed where possible but in order to do so, we must first understand how Japanese knotweed spreads in the first place. So, let's find out!

 

Spreading Japanese Knotweed

Since we've already mentioned the rate at which knotweed can grow (10cm per day), we can now dive into how it spreads further afield. 

Japanese knotweed has the ability to produce seeds, but surprisingly, these seeds do not germinate. Instead, the weed spreads via the stem, rhizome and crown in the following ways.

Stem

Fresh Japanese knotweed plants can grow from the nodes of the green stem in both water and soil.

Rhizome

Even the smallest piece of knotweed rhizome can grow into a full plant. By breaking up the rhizome into small pieces, you can stimulate it to create small buds which then grow to form each new plant. To avoid this, be sure to never accept topsoil that hasn't been checked as you may be spreading rhizomes without ever knowing.

Crown 

That crown forms part of the knotweed's stem and is able to survive both composting and drying. If you want to dispose of using either the method of drying or composting, make sure you cut the stems right above the crown. Knotweed is able to spread by producing new canes once it comes into contact with soil or water.

 

How far does Japanese knotweed spread?

There is no limit to how far a Japanese knotweed infestation can spread, which is why it has become such a nuisance for so many in the UK over the last decade or so. If it is given the right amount of space and nutrients, it is able to grow indefinitely. Also, as a result of the speed and ease with which knotweed can spread, it has been labelled as an invasive weed by the UK government.

 

How to stop Japanese knotweed from spreading 

Few methods exist which help to stop the spreading of Japanese knotweed. However, these techniques often require professional help in order to be effective. Removing Japanese knotweed usually involves a combination of methods which includes excavation, herbicidal spray, burning and burial to prevent rhizomes from successfully surfacing shoots.

 

If you believe you have spotted Japanese knotweed on or near your property and would like professionals to come out and take a look, Taylor Total Weed Control are here to help! Our team of experienced professionals can survey your property and confirm whether knotweed is present. If it is, we are then able to construct a dedicated programme aimed at removing and stopping further spread of the plant.

To learn more about our expert knotweed services, click here. If you would like to get in touch with a member of our team, fill out our quick and easy form below - we look forward to hearing from you!

Don't miss an update - be sure to follow Taylor Total Weed Control on Facebook and Twitter!

eradicate japanese knotweed

In previous blogs, we've spoken about the damage that Japanese knotweed can cause, the effect Japanese knotweed has on house prices and the persistence of Japanese knotweed that always seems to find its way back. 

When you get to understand how much of a problem Japanese knotweed is, you begin to question - "Is it possible to eradicate Japanese knotweed permanently?"

The short answer, yes! It's 100% possible to get rid of Japanese knotweed from your property permanently but DIY methods are not the way to do it. We've heard stories of people tackling their Japanese knotweed problems with all kinds of home remedies including bleach and salt - none of which have done a good enough job to get rid of the troublesome weed for good. 

Speak to the Professionals

With Japanese knotweed treatment, you can't afford to mess around. As we've mentioned, there are a whole host of reasons why Japanese knotweed needs to be eradicated completely and permanently. Not only can it cause structural damage it can also make selling your home incredibly difficult. 

Here at Taylor Total Weed Control, we offer comprehensive Japanese knotweed treatment packages that begin with a FREE consultation. Our technicians will visit the site and carry out an assessment of your Japanese knotweed problem. 

From there, they can offer you a range of Japanese knotweed treatment options that are effective at killing the Japanese knotweed shoots and the root network underground. 

Request a Free Survey Now >

Japanese Knotweed Guarantee 

We know what you're thinking, how can you be sure that these Japanese knotweed treatments will eradicate the Japanese knotweed permanently? That's where our Japanese knotweed guarantees come in.

We offer a 5 or a 10-year guarantee with our Japanese knotweed treatment plans that ensures your home is kept Japanese knotweed free permanently after it's treated. Our specialist team will work with you for as long as you need, and can even carry out Japanese knotweed treatments as and when you need them if you find that the problem re-occurs. 

If you have any questions about our Japanese knotweed treatments, please don't hesitate to give us a call on 029 2039 7554.

best time to treat japanese knotweed

While there's never a good time to find Japanese knotweed on your property, there is an optimum time to treat it if you want to make sure it stays out of your garden all year round. As with all weed removals, timing is key if you want your removal processes to have maximum effect. Treating weeds like Japanese knotweed at the wrong time of year will make the removal process harder and will also put you at risk of spreading the infestation further around your garden. 

So, when is the best time to treat Japanese knotweed?

Although some people might argue that the best time to treat Japanese knotweed is in the spring/summer when it's growing most rapidly, we've found that the best time to treat Japanese knotweed with herbicides is in autumn. Here's why!

During autumn, the Japanese knotweed stops putting energy into growth and instead uses its energy to move sugars and nutrients down towards its underground rhizome structure. This is an important part of the plant's lifecycle because it ensures the plant will survive during the harsh winter months. 

We take advantage of this shift in energy and spray the Japanese knotweed with our specialist herbicides so that they will travel down with the natural flow of nutrients and penetrate deep underground to effectively treat the parts of the plant that you can't see!

Can I treat Japanese knotweed in spring/summer?

If you notice a developing Japanese knotweed problem, we'd always recommend getting a survey right away so that you can determine the right time and type of treatment for your specific case. Generally, we don't treat Japanese knotweed as much during the spring/summer months because the herbicides can be less effective. During this time, the Japanese knotweed is putting all of its available energy into pushing nutrients up to the leaves and flowers, so herbicide applications can kill off the top section of the weeds without really addressing the rhizomes underground. 

If you do need to treat Japanese knotweed during the warmer months, we'd probably recommend choosing a more aggressive form of treatment like excavation. This is much more likely to remove the Japanese knotweed above and below ground. 

What are my Japanese knotweed treatment options?

When it comes to treating Japanese knotweed, there are quite a few different options to choose from. Here at Taylor Total Weed Control, we offer a free no-obligation survey and a range of treatment plans to help you get your Japanese knotweed problem under control quickly. 

Our Japanese Knotweed Treatment Plans >

We hope that this shed some light on the best time to treat Japanese knotweed. If you have any questions at all, don't hesitate to get in touch with our team - 029 2039 7554.

new build property

The thought of buying your first home is exciting, we know, but we want to warn you of the potential for Japanese knotweed on new build plots. It has recently come to light that property developers have been taking advantage of a loophole in the Japanese knotweed regulations, which means knotweed has been cropping up on new build housing plots up and down the country. Let us explain...

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why can't you cut Japanese knotweed?

Over the past few weeks, we've been looking at lots of different ways to get rid of Japanese knotweed. So far, we've debunked the myth that covering knotweed is an effective way to remove it and we've even explored the effects of adding lime to your soil! Sadly, neither of these methods has been proven to be effective, Japanese knotweed is just too good at surviving! 

When it comes to effective methods of Japanese knotweed removal, excavation, specialist herbicide treatments and burning have all been quite effective. These aggressive methods of treatment are capable of stopping the knotweed in its tracks! So surely cutting it down has to be effective too, right? Today we're answering the question - why can't you cut Japanese knotweed?

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can you kill japanese knotweed with lime?

People are always on the lookout for inventive ways to deal with Japanese knotweed. In a previous blog, we looked at whether salt could dehydrate and eventually kill it off, but sadly, the answer was no. Professional herbicides were required to deal with this hardy invasive species! But can any other naturally occurring materials kill Japanese knotweed?

Today we're looking at a different substance to see whether or not it can do a better job. As you can see from the title, today we're looking at the weed-killing properties of lime. No, not the kind that's often sliced and served in a mojito, the kind that's found in the earth's crust as limestone, chalk and marble.

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