Invasive weeds: How to get rid without damaging your property - including Giant Hogweed

Beth Franklin
By Beth Franklin
Published 14th Jun 2023, 16:59 BST
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Gardeners should be aware of invasive weeds that thrive in wet weather - how to get rid of them

As the Met Office forecasts rain on the way amid the first heatwave of the UK summer, many will be looking forward to their garden getting a good watering. However, with that comes some pests that in your garden that may begin to thrive.

There are certain invasive weed species in the UK that are known to thrive in wetter environments, such as waterlogged or poorly drained areas. One of which is Japanese Knotweed, which has seen an increase in 27.91% confirmed cases in the past 5 years.

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With this in mind, paving specialist and director of Infinite Paving Rowan Cripps, has highlighted the most common invasive weeds that thrive in wet humid weather conditions and the issues they may cause you financially, before explaining how to safely and effectively get rid of them without damaging different types of paving materials.

So, how can you manage invasive weeds in your garden? Here’s everything you need to know.

Japanese Knotweed

Japanese knotweed can tolerate wet conditions and spreads aggressively, making it a common problem in gardens near water sources or ones that have experienced heavy rainfall.

Using government-approved herbicides, such as glyphosate, the widely-used ingredient in RoundUp, is the most effective way to rid yourself of a Japanese knotweed infestation, although it can take up to three years to do so. Though it is advised to seek professional help.

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Giant Hogweed

Giant hogweed is another weed that thrives in damp and moist conditions and can even endure a wet and humid environment. The sap can cause burns to humans, though, causing blistering to the skin if it’s exposed to the sun.

Weed Killers containing glyphosate are usually the best choice for killing off Giant Hogweed as they attack the root. It is possible to remove this weed without chemicals, though, simply by digging it out, but protection must be worn to avoid irritation to the skin. You may have to repeat either process for several years, though, to fully eradicate the plant.