Botanical name
Polygonaceae
Features of knotweeds
Knotweeds are a family of plants that grow widespread in temperate regions. The stems are often striped and have several ridges. Most plants in this family are herbs or vines. Knotweeds can grow as perennials. Several species in this family taste quite tart due to a significant content of oxalic acid.
Species we grow
Rhubarb and sorrel.
Other common plants in this family
Familiar species grown for food like buckwheat and Vietnamese mint but also some of the worst invasive weeds like Japanese knotweed.