Japanese knotweed

The fast-growing creeper that suffocates, spreads and suppresses all other plant matter and destroys public and private property.

Fallopia japonica, synonyms Reynoutria japonica and Polygonum cuspidatum, commonly known as Asian knotweed or Japanese knotweed, is a large, herbaceous perennial plant of the knotweed and buckwheat family Polygonaceae. It is native to East Asia in Japan, China and Korea. 

Japanese knotweed (Fallopia japonica) is a weed that spreads rapidly. In winter the plant dies back to ground level but by early summer the bamboo-like stems emerge from rhizomes deep underground to shoot to over 2.1m (7ft), suppressing all other plant growth. Eradication requires determination as it is very hard to remove by hand or eradicate with chemicals.

The British Association of Landscape Industries has produced several articles surrounding this invasive weed which has caused significant damage to residential properties, live commercial sites and major infrastructure projects in the UK.

In instances where a member of the public or a commercial client seeks advice from BALI regarding the control or removal of Japanese knotweed, BALI normally refers the enquiry to the Property Care Association who have produced a free guide on how to deal with the problem. 

The Royal Horticultural Society has also produced an advice page for the weed including legal, legislative and control methods.