Widnes named as hotspot for destructive Japanese knotweed

This is according to new research by invasive plant specialist Environet, through analysis of the latest data from its live online tracker.

Analysis has revealed that occurrences of knotweed have reached 121 this year.

This is shown in an interactive map via environetuk.com, with the purpose being to alert homeowners and buyers to the risk level in their area.

Knotweed usually emerges in March or April and grows rapidly to reach up to 2.5metres in height by mid-summer.

It is identifiable by its hard, bamboo-like canes and distinctive shield-shaped bright green leaves which grow in a zigzag pattern along the stem.

The plant is usually spread accidentally through the movement of soil or gardening waste, or via rivers and streams when pieces of rhizome break off and take hold in new locations.

Tackling knotweed costs the UK economy nearly £250million a year.

Councils welcome residents to report occurrences of Japanese knotweed in the town to ensure it is removed properly.

A spokesman said: “If it is identified on council-owned land, a programme of herbicide treatment is implemented in line with the Environment Agency’s guidance to eradicate the plant.

Widnes named as hotspot for destructive and invasive Japanese knotweed (Image: Environet)

“It can take many years to completely kill the weed as repeated treatments are needed.

“However, if the plants are identified on private land such as a neighbouring property, a construction site or agricultural fields, the landowner should be contacted in the first instance as it is their responsibility to control.

“If residents know of any areas where Japanese Knotweed is present on council-owned land, it can be reported to us online.”

If you know any knotweed hotspots near you, report them at halton.gov.uk/Pages/Report-it.aspx

Nic Seal, founder of Environet, commented: “Vigilance is the best way to protect your property from the risks posed by Japanese knotweed.

“Make sure you know what knotweed looks like and how it differs from other common garden weeds like ivy and bindweed, so you can keep an eye out for it in your garden and neighbourhood.

“Knotweed is easily identifiable during summer, but as we head through the autumn and into winter, the above-ground growth dies back and it becomes much harder to spot.

“It is also easier to conceal, so anyone viewing a property to buy should be extra careful.

“There are lots of horror stories out there, but the with professional help, knotweed can be successfully treated, and a property’s value can be largely restored.”