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Denseflower knotweed
Polygonum glabrum
Polygonaceae
 

Copyright by: Susan Trammell

General Landscape Uses: Primarily recommended for natural landscapes and habitat restorations. Also margins of ponds and lakes.

Availability: Grown by enthusiasts.

Description: Small to medium creeping herb.

Dimensions: About 2-3 feet in height. Spreading and forming dense mats much broader than tall.

Growth Rate: Moderate.

Range: Eastern and southeastern United States west to Texas and south to Miami-Dade County and the Monroe County mainland; West Indies, Mexico, Central America, South America and the Old World tropics.

Plant Map Map of select IRC data from peninsular Florida.

 Map of suggested ZIP codes north to Indian River and Manatee counties.

 Map of ZIP codes with habitat recommendations north to Martin and Charlotte counties.

Habitats: Swamps and marshes.

Soils: Wet, poorly-drained sandy or organic soils, with humusy top layer.

Nutritional Requirements: Moderate; can grow in nutrient poor soils, but needs some organic content to thrive.

Salt Water Tolerance: Low; does not tolerate flooding by salt or brackish water.

Salt Wind Tolerance: Low; salt wind may burn the leaves.

Drought Tolerance: Low; requires moist to wet soils and is intolerant of long periods of drought.

Light Requirements: Full sun to light shade.

Flower Color: White.

Flower Characteristics: Semi-showy.

Flowering Season: Spring-fall.

Fruit: Inconspicuous nut.


Copyright by: Susan Trammell

Copyright by: Shirley Denton

Copyright by: Shirley Denton


Other data on Polygonum glabrum available from:



 
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