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© Deeproot Plant Base
common name: Creeping Knotweed, Pinkhead Smartweed
synonyms: Persicaria capitatum, Polygonum capitatum, Cephalophilon capitatum
perennial, evergreen, semi-evergreen, ground-cover
growth rate: fast
growth habit: prostrate
leaf colour: dark green
flower colour: pink
stem/bark: red & green
main season: Summer
full sun, part shade
moist soil, clay soil, sandy soil
preferred soil pH: any
minimum temp: -3°C
USDA zone: 9 to 10
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.
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.
By seed or division. May self seed.
Ground cover, wall and paving crevices, containers, hanging baskets.
From the foothills of the Himalayas. Naturalised in other locations.