Index / Search / Polygonum sachalinense
§1 Plant
Polygonum sachalinense F. Schmidt ex Maxim.
vernacular giant knotweed — species · Polygonaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Dicot
- Family
- Polygonaceae Juss.
- Genus
- Polygonum
Native status, by region
- AK Alaska Introduced
- CAN Canada Introduced
- L48 Lower 48 States Introduced
County-level range
· 171 counties across 26 states/territories§3Cultivation
No cultivation specs.
USDA has not characterised this taxon. Roughly four out of five plants in the database lack the detailed cultivation record present here — typically because they have not been the focus of NRCS Plant Materials work. Range and distribution data are unaffected.
§4Counties, by state
Recorded in 171 counties across 26 states/territories.
Alaska view state ↗ 1 I ▾
California view state ↗ 12 I ▾
District of Columbia view state ↗ 1 I ▾
Idaho view state ↗ 6 I ▾
Illinois view state ↗ 2 I ▾
Kentucky view state ↗ 3 I ▾
Louisiana view state ↗ 1 I ▾
Maine view state ↗ 2 I ▾
Massachusetts view state ↗ 9 I ▾
Michigan view state ↗ 3 I ▾
Minnesota view state ↗ 1 I ▾
Missouri view state ↗ 1 I ▾
Montana view state ↗ 21 I ▾
- Carbon 30009
- Chouteau 30015
- Custer 30017
- Fergus 30027
- Flathead 30029
- Gallatin 30031
- Hill 30041
- Lake 30047
- Lewis and Clark 30049
- Liberty 30051
- Lincoln 30053
- Missoula 30063
- Park 30067
- Ravalli 30081
- Richland 30083
- Sanders 30089
- Silver Bow 30093
- Stillwater 30095
- Sweet Grass 30097
- Teton 30099
- Yellowstone 30111
New Jersey view state ↗ 6 I ▾
New York view state ↗ 14 I ▾
North Carolina view state ↗ 3 I ▾
Ohio view state ↗ 7 I ▾
Oregon view state ↗ 12 I ▾
Pennsylvania view state ↗ 23 I ▾
- Allegheny 42003
- Beaver 42007
- Bedford 42009
- Berks 42011
- Blair 42013
- Bucks 42017
- Cameron 42023
- Chester 42029
- Clarion 42031
- Clearfield 42033
- Clinton 42035
- Elk 42047
- Erie 42049
- Fayette 42051
- Forest 42053
- Jefferson 42065
- Lebanon 42075
- Lehigh 42077
- Monroe 42089
- Philadelphia 42101
- Schuylkill 42107
- Warren 42123
- Westmoreland 42129
Rhode Island view state ↗ 1 I ▾
Tennessee view state ↗ 5 I ▾
Virginia view state ↗ 3 I ▾
Washington view state ↗ 21 I ▾
- Chelan 53007
- Clallam 53009
- Clark 53011
- Grays Harbor 53027
- Island 53029
- King 53033
- Kittitas 53037
- Klickitat 53039
- Lewis 53041
- Okanogan 53047
- Pacific 53049
- Pend Oreille 53051
- Pierce 53053
- San Juan 53055
- Skagit 53057
- Skamania 53059
- Snohomish 53061
- Thurston 53067
- Wahkiakum 53069
- Walla Walla 53071
- Whatcom 53073
West Virginia view state ↗ 7 I ▾
Wisconsin view state ↗ 4 I ▾
Wyoming view state ↗ 2 I ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/POSA4 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/2889088 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z