PERSICARIA

Commonly known as (Polygonum) - Knotweed

Genus of about 150 annuals and perennials. They may be evergreen, semi-evergreen or deciduous and many spread by stolons leading to a spreading habit which can be invasive. This habit and their commonly used name knotweed can give cause for concern but used wisely they are worthy performers. They are found in a variety of habitats worldwide and most have long-lasting spikes of flowers followed by distinctive 3-angled or ovoid fruits.

Further Reading....
  • Deciduous
  • Evergreen
  • Semi-evergreen
    Keeps some of its foliage all year, and will drop some leaves as well.
  • Red
  • Shades of pink
    All shades of pink through to Carmine (red)
  • White
  • Full sun
  • Partial shade
  • Additional Features
    Good to know
    Poker type flowers. Some have attractive autumn colour. Some are invasive. Wildlife plant - insects.
    Pests & Diseases
    Generally trouble-free.
    Place of origin
    Various habitats around the world.
    Resistant to honey fungus
    These plants have little or few problems with honey fungus.
  • Soil Conditions
    Fertile moist well-drained soil
    Will tolerate any moist soil
Persicaria - Growing Guide

Buy Varieties of PERSICARIA

PERSICARIA affinis

PERSICARIA affinis

Knotweed, Polygonum

deep pink

 
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PERSICARIA affinis 'Darjeeling Red'

PERSICARIA affinis 'Darjeeling Red'

Knotweed, Polygonum

excellent ground cover with bright crimson flowers

 
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PERSICARIA alpina

PERSICARIA alpina

Alpine knotweed

(syn. P. polymorpha) - tall growing with tall stems or plumes of creamy-white flowers

 
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PERSICARIA amplexicaulis 'Blackfield'

PERSICARIA amplexicaulis 'Blackfield'

Knotweed, Polygonum

slender flowers in deep red-black. A smouldering beauty

 
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PERSICARIA bistorta 'Superba'

PERSICARIA bistorta 'Superba'

Adderwort, Bistort, Polygonum

clear pink poker flowers

 
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PERSICARIA microcephala 'Red Dragon'

PERSICARIA microcephala 'Red Dragon'

Bistort, Knotweed

tall and spreading variety with dramatic brownish-red leaves with black markings

 
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PERSICARIA vaccinifolia

PERSICARIA vaccinifolia

Knotweed, Polygonum

tiny pink flowers, good ground cover, and excellent autumn colour

 
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