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What is Japanese Knotweed?
Japanese Knotweed was introduced into Britain in the 19th century as an ornamental plant. Over time it has become widespread in a range of habitats including roadsides, railway embankments, riverbanks and derelict buildings. The invasive root system and strong growth can out-compete native plants and animals, damage foundations, buildings, roads, paths, retaining walls and architectural sites. It can also reduce the capacity of channels in flood defenses to carry water.
knotweed, Reynoutria japonica (synomyns: Fallopia japonica and Polygonum cuspidatum) is the most
widespread form of knotweed in the UK. Stems form a zig-zag growth pattern,
with one stem shoot per node. The leaves are fairly smooth, mid-green in color,
with a characteristic straight top edge, giving the leaf a shield or
flowers are small creamy-white and form in loose clusters (panicles) in late
summer or early autumn. All Japanese knotweed plants growing in the UK are
female and therefore do not produce viable seeds.
does not produce seeds, knotweed can grow from very small sections of rhizomes
and under the provisions made within the Wildlife and Countryside Act 1981, it
is an offence to cause Japanese Knotweed to grow in the wild. Much of its
spread is probably via topsoil movement or construction traffic.
For more information about Japanese Knotweed click here for the Environment Agency website.
|Do you have Japanese Knotweed? We can identify, carry out site surveys, provide management plans and manage treatment plans.
||Do you have Japanese Knotweed? We can identify, carry out site surveys, provide management plans and manage treatment plans.