Giant Knotweed (Polygonum sachalinense)


Polygonum Sachalinense, or more commonly know as Giant Knotweed, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) of the genus Polygonum. Its duration is perennial which means it will grow year after year. Polygonum Sachalinense or Giant Knotweed's floral region is North America US Lower 48 and Alaska, specifically in the states of Alaska, California, Connecticut, Delaware, Idaho, Illinois, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Montana, North Carolina, New Jersey, New York, Ohio, Oregon, Pennsylvania, Rhode Island, Tennessee, Virginia, Vermont, Washington and Wisconsin.

  • Category: Dicot
  • Genus: Polygonum
  • Family: Polygonaceae
  • Order: Polygonales
  • Class: Magnoliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Forb/herb
  • Native Status: L48 (I) AK (I) CAN (I)
  • State Noxious Status: CA (BW) CT (PIB) OR (BDW Q) WA (CBW NWSPQ)
  • State Noxious Common Name: CA (giant knotweed) CT (giant knotweed) OR (giant knotweed) WA (giant knotweed)
  • PLANTS Invasive Status: SEEPPC STATE
  • National Wetland Indicator Status: UPL NI
  • Regional Wetland Indicator Status: 1(UPL*) 2(UPL) 3(NI) 9(FACU*) 0(NI)

Browse Plants by State

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming