Japanese knotweed thriving in Worcestershire due to rain

Unusual early growth of the plant's distinct red stems has been observed in February, ahead of its typical growing season, and they need to be dealt with promptly.

These findings were reported to the Property Care Association (PCA).

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Technical manager for PCA's Invasive Weed Control Group (IWCG), Daniel Docking, said: "We can still expect late season frosts and dry weather in March and April, but Japanese knotweed has already started to establish itself and the resilience of the plant will mean it is in a strong position to thrive.

“At the moment many plants are doing well due to the weather conditions, including native species.

“But we’d still suspect the temperature to drop, meaning many plants will slow down their growth pattern."

He added: "However, Japanese knotweed will be largely unaffected by these changes and that means it can start to dominate environments, with more opportunities to spread."

The ICWG is a body of industry professionals providing guidance on standards, serving as a reference point for property professionals, and aiding homeowners in locating reliable contractor services to manage invasive weeds.

As the visibility of Japanese knotweed increases, Mr Docking advises anyone with concerns to seek expert advice promptly, saying: "Advice sought quickly will help to control and manage the situation effectively.

"Japanese knotweed is tied to legislation, which means landowners have a responsibility to manage infestations responsibly."

He added: “Our ICWG members have a range of options to treat infestations, so it’s essential to engage a competent Certificated Surveyors in Japanese knotweed (CSJK) who will have the specialist skills and knowledge to identify Japanese knotweed or any other invasive plants that may be present.”

More information about the PCA’s ICWG can be found on its website (https://www.property-care.org/homeowners/invasive-weed-control/).