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Denseflower knotweed
Polygonum glabrum
Polygonaceae


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.
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.


 


Susan Trammell
Shirley Denton
Shirley Denton