• AGM plants

    AGM plants have been through a rigourous 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

Crambe maritima

Sea kale

Sea kale

© � RHS 1999

  • Other common names Sea kale
    Sea cabbage

    Sea colewort

    see more
  • Genus Crambe are robust annuals and perennials with large, simple or divided leaves and racemes or large panicles of small, fragrant white flowers

  • Family Brassicaceae / Brassicaceae

  • Species C. maritima is a robust herbaceous perennial to 75cm, forming a clump of large, lobed, wavy-edged blue-green leaves, with dense racemes of small white flowers in early summer

  • Plant range Europe, N Africa, SW Asia


  • Foliage Deciduous

  • Habit Clump-forming

  • Fragrance Flower



  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained

  • SoilSand, Clay, Chalk, Loam

  • pHAcid, Alkaline, Neutral


  • Ultimate height

    0.5-1 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Ideally grow in a deep, fertile, well-drained soil in full sun although it will tolerate poor soil and partial shade. Provide shelter from strong winds

Propagation Propagate by seed sown in pots in a cold frame in spring or autumn or propagate by division in early spring or take root cuttings in winter

Suggested planting locations and garden types Flower borders and beds Cut Flowers Cottage & Informal Garden Wildlife Gardens

How to care

Pruning Cut down to ground level in autumn

Pests Slugs and caterpillars may be a problem

Diseases May be subject to club root

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