Stokesia laevis 'Purple Parasols'

RHS Plant Profile
Stokes' aster 'Purple Parasols'

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Stokes' aster 'Purple Parasols' RHS
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Herbaceous Perennial
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A compact herbaceous perennial, up to 45cm high, with evergreen rosettes of slender green leaves and large deep violet cornflower-like flowers with paler centres from midsummer to early autumn

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun Partial shade
Aspect
South–facing or East–facing or North–facing or West–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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Columnar upright
Genus
Stokesia are perennials producing evergreen, basal rosettes. The colourful, cornflower-like flowers are long lasting and good for cutting
Name Status
Accepted

How to Grow

Cultivation

Plant in light, well-drained soil in sun or light shade; does best in acidic soil

Propagation

Propagate by division in spring or root cuttings in late winter

Suggested planting locations and garden types

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

Pruning

No pruning required, but plants can be cut down to ground level in autumn or winter

Pests

Generally pest-free

Diseases

Generally disease-free