An invasive species: knotweed (fallopia japonica)

Marker 8Sakhalin knotweed, just like Japanese knotweed, is an invasive species. That means it is not in its environment of origin and grows at the expense of other species, alongside roads and on the banks of many rivers. A “test zone” project aiming to limit the species is being studied at L'Hort de Dieu, thus continuing the experimental mission of the arboretum. To stop knotweed from proliferating, ripping-up, rhizome destruction and covering- up with tarpaulins are all being tried.