Japanese Knotweed

Japanese Knotweed and other non native invasive species are becoming an ever more increasing problem in Ireland. It has been reported that invasive species cost the Irish economy over €200 million annually and this figure is likely to rise into the future with both increasing awareness and efforts to prevent their spread.

Japanese Knotweed is a robust perennial plant which grows rigorously with the potential to spread rapidly, growing up to 2-3m in one growing season. It has an underground rhizome system consisting of stems/roots that can stretch horizontally up to 7 meters and it can grow almost anywhere as it can tolerate extreme conditions such as low temperatures, acidic soils and waterlogged/saline environments.

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