Polygonum amplexicaule

Mountain Fleece, Knotweed, Smartweed

Family: Polygonaceae Buckwheat


Type Perennial
USDA Hardiness range 5B - 9A
Exposure Full sun
Bloom color Pink, purple, red, white
Bloom time Mid Summer to Late Fall
Water needs Moist
Landscape uses Border, ground cover, rock garden
Height 24" to 5' / 60cm to 1.60m
Spread n/a
Growth rate Fast
Leaf color Green
Fruit color n/a
Soil pH requirements Neutral
Soil type Sandy, loamy
Form Upright or erect
Attributes and features Attractive foilage, naturalizing