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My Burncoose




6th January 2021. In line with the current government lockdown rules, Burncoose Nurseries is closed to visitors. However at present we are able to offer click and collect to local customers. This will be weekdays only, not weekends. Mail order is continuing as normal. However please allow extra time for the couriers to deliver, once despatched from us. Sorry to say that some depots are experiencing high volumes of traffic, also staff shortages.


Commonly known as Alpine knotweed

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

Available Early Spring 2021 - Should be available March/April onwards depending on growing conditions.
individually £11.50 each, 3+ £9.00 each


  • 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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