Davis' Knotweed

Scientific Name: Polygonum davisiae W.H. Brewer ex A. Gray


Classification: Plantae/ Tracheobionta / Spermatophyta / Magnoliophyta / Magnoliopsida / Caryophyllidae / Polygonales / Polygonaceae / Polygonum L./ Polygonum davisiae W.H. Brewer ex A. Gray

Do you have an image of this plant? Upload now!

General Information
Usda SymbolPODA
GroupDicot
Life CyclePerennial
Growth HabitsForb/herbSubshrub,
Native LocationsPODA

Plant Guide

Use soil moisture sensors to measure the soil moisture of Davis' Knotweed.

Plant Traits

Growth Requirements

Temperature, Minimum (°F)-23
Adapted to Coarse Textured SoilsYes
Adapted to Fine Textured SoilsNo
Adapted to Medium Textured SoilsYes
Anaerobic ToleranceNone
CaCO3 ToleranceLow
Cold Stratification RequiredNo
Drought ToleranceMedium
Fertility RequirementLow
Frost Free Days, Minimum120
Hedge ToleranceNone
Moisture UseLow
pH, Maximum7.8
pH, Minimum6.4
Planting Density per Acre, Maxim2700
Planting Density per Acre, Minim1700
Precipitation, Maximum30
Precipitation, Minimum14
Root Depth, Minimum (inches)14
Salinity ToleranceNone
Shade ToleranceIntermediate


Morphology/Physiology

BloatNone
ToxicityNone
Resprout AbilityNo
Shape and OrientationErect
Active Growth PeriodSpring and Summer
C:N RatioHigh
Coppice PotentialNo
Fall ConspicuousNo
Fire ResistantNo
Flower ColorPurple
Flower ConspicuousYes
Foliage ColorGreen
Foliage Porosity SummerPorous
Foliage Porosity WinterPorous
Fruit/Seed ColorBrown
Nitrogen FixationNone
Low Growing GrassNo
LifespanModerate
Leaf RetentionNo
Known AllelopathNo
Height, Mature (feet)1.3
Growth RateModerate
Growth FormSingle Crown
Fruit/Seed ConspicuousYes
Foliage TextureMedium


Reproduction

Vegetative Spread RateNone
Small GrainNo
Seedling VigorMedium
Seed Spread RateSlow
Seed per Pound125000
Fruit/Seed PersistenceNo
Propagated by TubersNo
Propagated by SprigsNo
Propagated by SodNo
Propagated by SeedYes
Propagated by CormNo
Propagated by ContainerYes
Propagated by BulbNo
Propagated by Bare RootNo
Fruit/Seed Period EndSummer
Fruit/Seed Period BeginSummer
Fruit/Seed AbundanceLow
Commercial AvailabilityNo Known Source
Bloom PeriodEarly Summer
Propagated by CuttingsYes


Suitability/Use

Veneer ProductNo
Pulpwood ProductNo
Protein PotentialLow
Post ProductNo
Palatable HumanNo
Palatable Graze AnimalLow
Palatable Browse AnimalLow
Nursery Stock ProductNo
Naval Store ProductNo
Lumber ProductNo
Fodder ProductNo
Christmas Tree ProductNo
Berry/Nut/Seed ProductNo
[Plant Index] [Site Map]