• 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

Cephalaria gigantea

giant scabious

giant scabious

© � RHS 1998

  • Other common names giant scabious
    yellow scabious

  • Synonyms Cephalaria caucasica
    Cephalaria tatarica hort.

    Scabiosa gigantea
    Scabiosa tatarica

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  • Genus Cephalaria are annuals or perennials with pinnately divided leaves and scabious-like flower-heads

  • Family Caprifoliaceae / Caprifoliaceae

  • Details C. gigantea is a perennial forming a clump of pinnately lobed basal leaves, with tall, branched stems carrying light yellow flower-heads to 6cm across in summer

  • Plant range Caucasus, Siberia


  • Foliage Deciduous

  • Habit Columnar/Upright



  • Full Sun

  • Partial Shade

  • Aspect South-facing or East-facing or West-facing or North-facing

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureMoist but well-drained

  • SoilLoam, Chalk, Sand, Clay

  • pHAcid, Alkaline, Neutral


  • Ultimate height

    1.5-2.5 metres

  • Ultimate spread

    0.5-1 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Grow in a fertile moist but well-drained soil in sun or partial shade. Needs staking in exposed gardens.

Propagation Propagate by seed sown in pots in a cold frame in early spring or propagate by division in spring

Suggested planting locations and garden types Flower borders and beds Cut Flowers Wildlife Gardens

How to care

Pruning Cut back after flowering

Pests Generally pest free

Diseases Generally disease free

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