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Zones 1-9, 14-17, 31, 32
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Persicaria affinis

Knotweed
Polygonaceae
Ground covers, Perennials

PERSICARIA

Sturdy plants with jointed stems and small white or pink flowers. Some kinds tend to get out of hand and need to be controlled.

Persicaria affinis

Himalayan native. Spreading plant to 1 ft. high, 2 ft. or more wide. Deep green, lance-shaped, finely toothed leaves are mostly basal; they grow 2–4 1/2 in. long, turn bronze in winter. Dense, erect, 2–3-in. spikes of bright rosy red flowers bloom in summer, early fall.

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