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Commonly known as Alpine knotweed

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


Available Early Spring 2022 - Spring according to the Met office is defined as March 1st - May 31st. Therefore early spring is early March to mid-April. This is not a guaranteed date but an estimate and subject to availability.
individually £11.50 each , 3+ £9.00 each 

Delivery Information Available Early Spring 2022


  • Deciduous - linear to narrowly lance-shaped leaves to 15cm (6in) long on stalks 1cm (½in) long
  • White - creamy white
  • Height - to 1.8m (6ft)
  • Spread - to 1.5m (5ft)
  • Bulb/Corm or rhizomatous perennial - erect, clump-forming rhizomatous perennial, many branched from the middle upwards. Produces spikes of cup- to funnel-shaped flowers to 15cm (6in) long
  • Herbaceous - Early in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.
  • Hardy - very cold winter - Hardy in all of UK and northern Europe. Plant can possibly withstand temperatures down to -20°C (-4°F)
  • Full sun
  • Partial shade
  • Additional Features - Good to know - - also known as Polygonum alpinum acc. to RHS in the AtoZ (height and spread to 1m) and also Persicaria polymorpha by the RHS online (height and spread 2m x 1.5m)
  • Pests & Diseases - none
  • Place of origin - Eurasia
  • Resistant to honey fungus - These plants have little or few problems with honey fungus.
  • Hardiness - Fully hardy -
  • Seasonal Interest - Summer -
  • Soil Conditions - Tolerates all - - any moist soil
  • Wildlife - Rabbit Resistant -
to 1.8m (6ft)
bulb/corm - guide for size not form Average Person
  to 1.5m (5ft)

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