Skip to content
Skip to main content
PatternBase

Bearded Knotweed

Polygonum barbatum, Polygonaceae

Zones
7–11
Layer
Herbaceous
Lifespan
Annual
Growth
Fast

Guild Roles

ProducerGround CoverDynamic Accumulator

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (tolerated)

Water

High (established)High (seedling)

Soil pH

5 – 8

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Fan SedgeCyperus flabelliformis
Wind Protection
American JointvetchAeschynomene americana
Nitrogen FixationPollinator Sharing

Antagonistic Plants

Water SmartweedPolygonum amphibium

Related smartweeds may compete and exhibit allelopathic interactions when growing in proximity

Long-fruited Primrose WillowLudwigia octovalvis

Both are fast-growing marginal plants that compete for space and resources in wetland edges

Uses

Functions

Water FiltrationErosion ControlHabitat CreationNutrient Cycling

Edible Parts

Young LeavesShoots

Medicinal Uses

Anti InflammatoryDigestive Aid

Common Questions

What zones does Bearded Knotweed grow in?

Bearded Knotweed grows in USDA hardiness zones 7 through 11.

What are good companion plants for Bearded Knotweed?

Good companions for Bearded Knotweed include Fan Sedge, American Jointvetch.

Design guilds with Bearded Knotweed and see companion relationships visually.

Try PatternBase free