Index / Search / Polygonum sachalinense
§1 Plant — species · Polygonaceae
Polygonum sachalinense F. Schmidt ex Maxim.
vernacular giant knotweed
§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
§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.
§4Montana distribution
Recorded in 21 of 56 Montana counties.
- 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
§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-2026-05-25
fetched 2026-05-25T16:28:53Z