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Northwest Blooms · Groundcovers

Persicaria capitata

Pink Knotweed

Persicaria capitata
Family
Polygonaceae
Height
4 to 20 inches
Width
12 to 24 inches
Flower color
White to pink
Foliage color
Green with maroon V-shaped markings
Bloom time
Early to late summer
Light
Full sun to partial shade
Water
Moderate; prefers well-drained soil
Maintenance
Low; may require containment to prevent spreading
Growing zone
USDA zones 7 to 10
Wildlife
Attracts bees and butterflies

About this plant

Persicaria capitata is a perennial herb native to regions spanning the Indian Subcontinent, Southeast Asia, and parts of China. It blooms from early to late summer, producing small, spherical flower heads that range from white to pink in color. These flowers appear in dense clusters, adding a soft, rounded texture to the plant. The plant's spreading habit allows it to form a dense groundcover that is both attractive and resilient.

With prostrate stems that root at the nodes, Persicaria capitata establishes a strong presence in the landscape. Its leaves feature occasional red to pink markings, contributing to its ornamental appeal, and thrives in diverse environments, from cultivated gardens to more naturalized settings. Although it is admired for its groundcover capabilities, it can be invasive in some areas.

Works well in

Cottage Gardens · Borders · Pollinator Gardens · Slopes & Banks

Companion plants

Aubrietas · Potentillas · Catmints · Blanket flowers · Candytuft · Lavender

Design tip

Use this spreading groundcover to soften the front of sunny borders or stabilize gentle slopes with colorful foliage and flowers. Surround it with upright perennials, graceful grasses, and flowering shrubs to create contrast, texture, and a natural flowing composition.