Details
 
 
 
Persicaria bistorta is a vigorous rhizomatous perennial to 1m tall, with prominently veined, ovate leaves to 30cm long, and dense spikes of small pale pink flowers in summer and early autumn
 
 
 
Hardiness
 
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
 
H7 - Hardy in the severest European continental climates (< -20)
 
 
 
Sunlight
 
Full sun, Partial shade
 
Aspect
 
East-facing, South-facing, West-facing
 
Exposure
 
Sheltered or Exposed
 
 
 
Moisture
 
Poorly-drained, Moist but well-drained
 
 
 
Soil
 
Chalk, Clay, Sand, Loam
 
 
 
pH
 
Acid, Alkaline or Neutral
 
 
 
Size
 
Ultimate height
 
0.5-1 metres
 
Ultimate spread
 
0.5-1 metres
 
Time to ultimate height
 
2-5 years
 
 
 
How to grow
 
Cultivation
 
Ideal for a moist soil although it can tolerate some dryness; copes in full sun or partial shade
 
 
 
Propagation
 
Propagate by division in spring or autumn
 
 
 
Suggested planting locations and garden types
 
Flower borders and beds Cottage & Informal Garden
 
 
 
How to care
 
Pruning
 
Deadhead faded spikes
 
 
 
Pests
 
Generally pest free
 
 
 
Diseases
 
Generally disease free
 
 
 
Info. courtesy of the RHS