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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.

Map of select IRC data from peninsular Florida.

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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