Stokesia laevis 'Omega Skyrocket'

RHS Plant Profile
Stokes' aster 'Omega Skyrocket'

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Stokes' aster 'Omega Skyrocket' RHS

Synonyms

Stokesia laevis 'Skyrocket'

Plants for pollinators
Herbaceous Perennial

'Omega Skyrocket' is an evergreen perennial forming a basal rosette of leaves up to 20cm long, with prominent white midribs. Upright stems with smaller leaves carry large, cornflower-like flowerheads up to 10cm across, light purple florets with a silvery centre, from mid summer to early autumn

Position

Full sun

Soil Types

Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Loam Sand
Moisture
Moist but well–drained
pH
Acid

Position

Full sun
Aspect
South–facing
Exposure
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
Bushy
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

Needs a light, fertile, moist but well-drained, acid soil in full sun. Liable to rot in damp, wet soils. Usually needs staking (see staking perennials)

Propagation

Propagate by seed sown in autumn, by division in spring, or root cuttings in winter

Suggested planting locations and garden types

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

Pruning

Deadhead to prolong flowering

Pests

Generally pest-free

Diseases

Generally disease-free