Knotweed - Polygonum capitatum - photo by A. J. T. Johnsingh
Knotweed
Genus: Polygonum
Species: capitatum
Variety:
Synonyms: Persicaria capitata
Type: Annual/Perennial
Family: POLYGONACEAE
Origins: Japan
Light: Full Sun to Part Shade
Wind: Medium
Growth: Fast
Frost: Marginal
Evergreen: No
Native: No
Height: 0.2m
Width: 0.6m
Groundcover Rockery
Easy to find
Pink
January February October November December
Zone: 8 Zone: 9 Zone: 10
This information is provided as a free service to viewers. We do not sell these plants.
A rapid growing, evergreen ground cover, it is covered with globular heads of pink flowers in summer.
The leaves are green turning to red in very hot, dry conditions.
In many areas Knotweed is considered as a weed.
Soil: Poor soils keep the plant tidy and under control, otherwise it tends to behave as a weed.
Maintenance: Keep strictly under control.
Other Species: P. aubertii is a climber with panicles of flowers.
P. bistorta is a taller plant. The variety superbum is an improved form with larger flowers.
Author: Bob Saunders.
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Persicaria capitata
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