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botanical name:
Persicaria capitata
Persicaria capitata © Deeproot Plant Base
common name:  Creeping Knotweed, Pinkhead Smartweed
synonyms:  Persicaria capitatum, Polygonum capitatum, Cephalophilon capitatum
family:  Polygonaceae
characteristics: perennial, evergreen, semi-evergreen, ground-cover
height: 0.08m
width: 0.50m
growth rate: fast
growth habit: prostrate
leaf colour: dark green
flower colour: pink
stem/bark: red & green
main season: Summer
aspect: full sun, part shade
conditions: moist soil, clay soil, sandy soil
preferred soil pH: any
minimum temp: -3°C
USDA zone: 9 to 10
description:
Creeping, stem-rooting perennial which is evergreen in mild climates. Ovate to elliptic dark greyish green leaves are marked with a purplish-burgundy V-shape and older leaves are often tinged pink. Small, dense, rounded heads of pink flowers are held above the foliage on short stems in summer.

cultivation:
Not fully hardy and often treated as an annual in temperate areas. Any reasonably fertile, moist soil in sun or part shade. Will tolerate dry periods once established.
Can become invasive in warm climate areas.

propagation:
By seed or division. May self seed.

usage:
Ground cover, wall and paving crevices, containers, hanging baskets.

other notes:
From the foothills of the Himalayas. Naturalised in other locations.

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