Environet, the UK's leading specialist in Japanese knotweed removal, has warned that the invasive plant will begin to emerge in March and April as ground temperatures rise. If not identified and treated promptly, it can spread quickly and become established, potentially affecting property sales and leading to neighbour disputes.
Mortgage lenders may still offer loans on affected properties, but only if a professional treatment plan with an insurance-backed guarantee is in place. Homeowners risk litigation if the plant spreads to neighbouring gardens.
Despite its notoriety, many struggle to identify Japanese knotweed. Environet's Free ID Service data shows the public correctly identifies it only 16% of the time, often mistaking it for bindweed or dogwood. The plant appears as reddish-purple shoots in spring, later forming bamboo-like canes with heart-shaped leaves.
Environet Director Emily Grant said: 'While most people have heard of Japanese knotweed, identifying it correctly is another matter. The best way to protect your property is to research knotweed identification online and be vigilant, particularly if a new plant appears this spring.'
She added that the longer knotweed is left, the more its underground root system spreads and the costlier removal becomes. Those buying or selling property should consider a professional survey for peace of mind.
