• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Callistephus chinensis

China aster

  • Other common names China aster
    annual aster

  • Family Asteraceae

  • Genus Callistephus are bushy, upright annuals with coarsely toothed ovate leaves and large, solitary, daisy-like flower-heads, often double in cultivars, in late summer and autumn

  • Details C. chinensis varies in height from 20 to 70cm, and width from 25 to 45cm. Chrysanthemum-like flowers can be single, semi double or double, 7 to 12cm across and held on branching stems over a long period from late summer into autumn. Colours include light and dark purple, light and dark pink, red, yellow and white

  • Plant range China


  • Foliage Deciduous

  • Habit Bushy

  • 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)




  • Full Sun

  • Aspect West-facing or South-facing

  • Exposure Sheltered


  • Chalk


  • Clay


  • Loam


  • Sand


  • MoistureMoist but well-drained

  • SoilChalk, Clay, Loam, Sand

  • pHAlkaline, Neutral


  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 1 year

How to grow

Cultivation Grow in a sheltered site in fertile, neutral to alkaline, moist but well-drained soil in full sun. Tall cultivars require staking

Propagation Propagate by seed sown at 16°C in early spring or in situ in mid-spring

Suggested planting locations and garden types Cut Flowers Flower borders and beds Cottage & Informal Garden Patio & Container Plants City & Courtyard Gardens

How to care

Pruning Deadhead to prolong flowering

Pests Prone to aphids and cutworms

Diseases Prone to wilt diseases

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