General Culture:
Easily grown in average, medium, well-drained soils in full sun. Prefers moist soils. Tolerant of heat, humidity and, once established, some drought. Not considered to be too aggressive as are some other species of polygonum and persicaria.
Noteworthy Characteristics:
This species of Persicaria is a shrubby, clump-forming perennial featuring plumes (panacled racemes) of creamy white flowers reminiscent of goat's beard (Aruncus dioecus) which bloom throughout the summer atop leafy stems typically rising 3-5' (less frequently to 6') tall. Lance-shaped dark green leaves. Synonymous with and sometimes sold as Polygonum polymorphum. Commonly known as knotweed or giant fleeceflower.
Problems:
No serious insect or disease problems. Taller plants may need some support.
Uses:
Specimen or group in borders, cottage gardens or naturalized areas. Mass on slopes.
© Missouri Botanical
Garden, 2001-2010
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