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