Polygonum weyrichii


Botanical Information

FamilyPolygonaceae
GenusPolygonum
Speciesweyrichii
SynonymsAconogonum weyrichii
CategoryPerennials
OriginEastern Asia and Japan (Sakhalin Island).
Ethnobotanical Uses
Disclaimer
Seeds can be ground into a meal for flours and porridge.

Details

USDA Hardiness Zone4 - 8
USDA Hardiness Ref.
Canada Hardiness Ref.
RHS Hardiness ZoneH7 - H5
RHS Hardiness Ref.
Temperature (°C)-30
Temperature (°F)-10
Height1.5 m
Spread0.5 - 1 m
GrowthMedium
Flowering PeriodJune, July, August, September

Description and Growing Information

ShapeMounding.
LandscapeAs ground cover, as hedges and borders or screens.
PropagationBy seed in spring or division in autumn.
CultivationPlant under partial sun to partial shade in moisture-retentive soils.
PestsNo known pests or diseases.
Notable SpecimensUniversity of Alberta Botanic Garden, Devon, Alberta, Canada.
HabitatGravelly Alpine slopes.
Leaf DescriptionSimple, broad-ovate to pinnate leaves with small hair-like fibres on the over and undersides.
Flower DescriptionInflorescences of 30 - 50 tiny flowers measuring 1 - 2 mm in diameter.
Colour DescriptionMedium green foliage and yellow-green flowers.
Texture DescriptionFibrous.

Photographs