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Herbaceous Perennial

Symphyotrichum 'Prairie Purple'
  • RHS Plants for pollinators

aster 'Prairie Purple'

A clump-forming herbaceous perennial to about 1m with dark green stems and foliage, flushed with dark purple. Light purple flowers with yellow to dark red centres open from late summer to late autumn

Synonyms
Aster 'Prairie Purple'
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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Purple Green Purple
Summer Green Purple Purple Green Purple
Autumn Green Purple Purple Green Purple
Winter
Position
  • Full sun
  • Partial shade
Aspect

South–facing or West–facing or East–facing or North–facing

Exposure
Exposed or Sheltered
Hardiness
H7
Botanical details
Family
Asteraceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Genus

Symphyotrichum includes around 90 species of annuals, biennials and perennials, mostly spread through the Americas, that were formerly included within the genus Aster. Leaves are simple, lance-shaped and entire, but it is their daisy-like flowerheads that they are grown for; central disc florets are typically yellow, surrounded by strap-shaped ray florets in shades of pink, blue, purple or white

Name status

Accepted

How to grow

Cultivation

Grow in rich, fertile, moisture-retentive soil, in full sun if the soil remains moist throughout the growing season, or in partial shade; mulch every year after cutting down in late autumn. Divide every third year to retain vigour and flower quality. May require support - see staking perennials

Propagation

Propagate by division in spring, replanting only vigorous young shoots

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Cut flowers
  • Flower borders and beds
Pruning

Cut back close to the ground in late autumn

Pests

May be susceptible to eelworm, aphids, slugs and snails

Diseases

May be susceptible to Fusarium foot rot, leaf spot, grey moulds and Verticillium wilt. Has some resistance to powdery mildews

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