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Persicaria bistorta - 'Superba' (Knotweed)

Persicaria bistorta - 'Superba' (Knotweed)
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Type Herbaceous flower, Deciduous, Ground cover, Flowering
Form Low Growing or Spreading Plant
Size Medium Border Plant (50-180cm height)
Colours Dark pink Flowers (Summer), Medium green Foliage
Care Low/Easy Maintenance - Tough Plant
Hardiness Very hardy
Growth Fast Growing Plant
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Persicaria bistorta Description

This fast growing, often invasive perennial produces attractive clumps of green foliage, throwing up spikes of pink flowers throughout the summer. Good for low maintenance woodland planting / difficult areas.


Persicaria bistorta - Cultivation Notes

Preferring moist fertile soils, Knotweed will flourish in full sun or part shade - tolerating chalky soils. Beware of invasive roots, and mulch every 2/3 years plus divide if scraggily.


Strengths, Weaknesses & Design Usage


Strengths of Persicaria bistorta:

  • All round tough plant suitable for problem areas
  • Suitable for container growing
  • Tolerates permanently wet soil
  • Tolerates cold exposed locations
  • Tolerates heavy clay soils

Weaknesses of Persicaria bistorta

  • Invasive/spreading root growth
  • Invasive top growth

Design & Plant Use for Persicaria bistorta:

  • Summer flowering herbaceous plant suitable for border planting

View all the plants listed in Genus Persicaria

View other ground cover plants with dark pink flowers, or ground cover plants with medium green foliage


Common Missspellings: Persacaria, Persicarea, Persecaria, Persiciria

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