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Bistorta amplexicaulis 'JS Purple Spear' (Red bistort 'JS Purple Spear')

Other names: Bistorta amplexicaulis 'JS Purple Spears', Persicaria amplexicaulis 'JS Purple Spear', Mountain fleece 'JS Purple Spear', Mountain fleeceflower 'JS Purple Spear', Polygonyum amplexicaule 'JS Purple Spear'

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Variety or Cultivar
'JS Purple Spear' is a clump-forming, deciduous perennial with large, ovate, veined, mid- to bright green leaves and dense, long-stalked spikes of small, red to reddish-purple flowers from midsummer into autumn.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
1.4 m 1 m 2-5 years
4 ft 3 ft 2-5 years

Where to grow

Soil type
  • Clay
  • Loamy
Soil drainage
  • Moist but well-drained
  • Moisture-retentive
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Partial Shade
  • Full Sun
Aspect
  • East
  • West
  • South
  • North
Exposure
  • Exposed
  • Sheltered

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Additional plant details

Cultivation

Plant in any moist soil in sun or partial shade.

Suggested uses

Rock, Beds and borders, Cottage/Informal, Low Maintenance, Prairie planting, Bees (attract & feed bees)

UK hardiness

H7

USDA zones

Zone 5, Zone 6, Zone 7, Zone 8

Sunset zone

2B, 3A, 3B, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 3

WUCOLS

North-Central Coastal = Moderate/Medium
Central Valley = High
South Coastal = Moderate/Medium
South Inland = Unknown
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Deciduous

Habit

Clump-forming

Native to

Garden origin

Drought tolerant

No

Flood tolerant

No

Toxicity

Not toxic

Plant care

Pruning

Cut back after flowering.

Propagation methods

Division

Pests

Generally pest-free.

Diseases

Generally disease-free.

Divide and replant clumps in autumn or early spring

Cut back after flowering in early autumn (optional)

Plant in fertile, moisture retentive soil

Plant container grown plants in a sunny postion

Plant in moist but well-drained soil (autumn or spring)

Plant in full sun or partial shade (autumn or spring)

Other plants

Plants in this Genus (0)

Bistorta

Companion plants (0)

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