Symphyotrichum novae-angliae 'Purple Dome'

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New England aster 'Purple Dome'

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New England aster 'Purple Dome' RHS

Synonyms

Aster novae-angliae 'Purple Dome'

Plants for pollinators
Herbaceous Perennial
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A clump-forming deciduous herbaceous perennial with stems that reach 60cm (2ft) high and as much across. In late summer to autumn, deep purple, semi-double daisies are produced, with a contrasting yellow centre. The flowers are extremely useful late season food source in the wildlife garden for butterflies and other pollinators. The late blooming season also makes the plant a useful addition to extend the season of interest in the garden border

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Well–drained or Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy, 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
Not established

How to Grow

Cultivation

Thrives in fertile, moist but well drained, preferably neutral to alkaline soil in sun or partial shade. Plants will benefit from mulching in autumn, and will not tolerate waterlogging in winter. May need support, see staking (perennials). For more advice see aster cultivation

Propagation

Propagate by division in spring; divide every third year to maintain vigour

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Wildlife gardens
  • Prairie planting
  • Cut flowers
  • Flower borders and beds

Pruning

Cut back old, flowered stems to the ground in late autumn

Pests

May be susceptible to tarsonemid mite, slugs, snails, aphids, leaf and bud eelworms

Diseases

May be susceptible to Fusarium wilt, powdery mildews and grey moulds