Aster diplostephioides

RHS Plant Profile
double crowned aster

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Herbaceous Perennial
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A herbaceous, perennial plant with a robust, branched rhizome. It forms a cluster of erect, unbranched stems up to 60cm tall. The plant is self-fertile

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun
Aspect
East–facing or South–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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming, Columnar upright
Genus
Aster can be perennials, annuals or subshrubs, mostly with narrow leaves, and solitary or clustered, daisy-like flowers
Name Status
Correct

How to Grow

Cultivation

Grow in well-drained, but moist, moderately fertile soil in an open, sunny position. It grows well in a rock garden or in wildflower meadows. See aster cultivation

Propagation

Propagate by division, root softwood basal cuttings or seeds in spring

Suggested planting locations and garden types

  • Cottage and informal garden
  • Rock garden
  • Wildflower meadow
  • Flower borders and beds

Pruning

Cut back stem close to the ground in late autumn or beginning of spring before the new shoots emerge

Pests

May be susceptible to leaf and bud eelworms, slugs and snails

Diseases

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