A selection of variegated leaf forms are also available. Many forms turn red or bronze in autumn. Sometimes streaked. Pink Knotweed self seeds readily where climate permits (zones 8-9). The pink flowers and lance-shaped leaves are a dead giveaway that you have found a Himalayan knotweed … Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae.Plants of the genus are known commonly as knotweeds: 436 or smartweeds. Lesser knotweed is shorter than Japanese knotweed, growing approximately 1.5m tall. Plant database entry for Pink Knotweed (Persicaria capitata) with 13 images and 38 data details. Flowers: Middle of summer through to early autumn. Green or reddish, simple oval, lance-shaped or elliptic leaves. Native to China and the Himalayas, this plant is a member of the buckwheat or dock family. Common Names: Obedient plant, False dragonhead, Correll's false dragonhead. Life Cycle: Hardy perennial. Physostegia Growing and Care Guide. Plant Name. This naturalized ornamental groundcover is native to western China and the Himalayas. Native: Temperate regions of Europe and Asia. One of the most invasive weeds in the world, Japanese knotweed is native to Asia, where it is regarded as having medicinal value. Flowering Period: Early summer to autumn. Its foliage is evergreen in milder climates. Spikes of flowers. The flowers on Himalayan Knotweed have a pink hue, which distinguishes them from the pure white of Japanese Knotweed’s. Unlike the other species, the Himalayan knotweed grows close to the ground, aiding in its dense nature. It has a cosmopolitan distribution, with species occurring nearly worldwide. Polygonum Plant Growing and Care Guide. Growing Region: Zones 3 to 9. Life Cycle: Half hardy annual, hardy annual.Half hardy perennial, hardy perennial. Duration: Perennial Growth Habit: Subshrub, Herb/Forb Hawaii Native Status: Introduced. Growing Persicaria (Bisort, Knotweed) Latin Name Pronunciation: per-si-kar'-ee-ah Members of this genus are sometimes included in Polygonum (known to many gardeners through the unwelcome guest called Knotweed). Native: Northern America. Leaves are a thin triangle between 4 and 8 inches long. Stems and flowers are similar to those of other knotweed species, though flowers are occasion-ally pink. Flowers: Vertical, long-lasting heads of small red, white or pink flowers, on spikes or panicles. Common Names: Knotweed Foliage: Deciduous. It was introduced to North America in the 1870s as an ornamental and forage plant. Height: 12 to 72 inches (30—210 cm). Himalayan knotweed (figure 6) grows to 6 feet tall. The growing patterns, leaf structures, interior stem, and pink flowers set this plant apart. Individual flowers are much bigger than those of Japanese knotweed and are clearly bell-shaped. Bohemian knotweed (figures 4 and 5) is a hybrid of Japanese knotweed and giant knotweed and has characteristics of both parents. Flower Details: Pink, purple. Tubular. They range in colour from pale to bright pink. Lipp Height: 2 to 135 inches (5 to 350 cm).Vines may grow up to 100 feet (30 M). Scientific Name: Polygonum capitatum Synonym: Persicaria capitata Common Names: Pinkhead Smartweed, Pinkhead Knotweed, Pink Knotweed Plant Characteristics. Japanese knotweed may be more effective than antibiotics at tackling Lyme disease, new study has found. The genus was segregated from Polygonum. Upwards of 50 species of annuals and perennials grow in … Pink Knotweed (Persicaria capitata) - Garden.org New and Unread Tree-Mails Common Names: Knotweed, Bistort, Wiregrass, Tear Thumb, Knotgrass, Arssmerte, Mile a Minute, Smokeweed, Swamp Smartweed. Nearly worldwide more effective than antibiotics at tackling Lyme disease, New study found... 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