SHORT ANSWER: Japanese knotweed can grow up to 10cm per day during the summer months.

Japanese knotweed has a reputation for fast, aggressive growth. Not only can this invasive plant species grow through cracks in brickwork and concrete, it can do so with rather frightening speed!

Japanese knotweed's growth rate depends on the time of year. As we've discussed previously (see When Does Japanese Knotweed Grow?) the plant goes dormant during the winter months, then re-emerges in the spring.

Summer is when the plant hits its top growing speed. Japanese knotweed loves warm weather, and it has been known to grow by as much as 10cm per day during the summer months!

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If your school's playing fields have seen better days, we at Total Weed Control may be able to help.

We offer a professional grounds maintenance service throughout South Wales and South West England. Whether you need us to provide occasional support for your in-house groundskeeping staff or a regular, comprehensive grounds maintenance service, we have the expertise and equipment necessary to keep your playing fields in tip-top condition.

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Like an unwanted house guest, Japanese knotweed can be difficult to get rid of. Patience and persistence are key to getting the job done properly.

Photo by Leonora Enking (View Original)

As we discussed in our blog about Japanese knotweed's growing cycle, this invasive species may appear to die off completely during the winter months. But appearances can be deceptive.

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It's lovely having a patio - especially when there's a pandemic in progress and the government are saying that you can't leave the house - but it's not quite so lovely when you notice furry green moss growing in between your patio pavers.

Photo by Amy G (Flickr)

Unfortunately, moss is a very common problem on patios - especially in the UK, where the damp weather often creates ideal growing conditions for this unsightly pest of a plant.

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When selling a property in this country, you have to fill out a TA6 form, which includes this question:

Is the property affected by Japanese knotweed?

☐  Yes

☐  No

☐  Not known

It's important for sellers to answer this question truthfully, because Japanese knotweed is an invasive species that can grow very rapidly and may cause structural damage if it grows through cracks in a wall or foundation. Homes with Japanese knotweed are notoriously difficult to sell, and getting rid of the plant can be an long and costly process.

READ MORE: Selling a House with Japanese Knotweed

Unfortunately, there are some dishonest people out there, and sellers will occasionally feign ignorance of their Japanese knotweed problem for fear that it will complicate the sale. So what should you do if you've discovered Japanese knotweed on your property...and the seller didn't tell you about it?

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