• 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

Juncus effusus f. spiralis

corkscrew rush

  • Other common names corkscrew rush

  • Synonyms Juncus effusus 'Spiralis'
    Juncus effusus 'Spiralis' dwarf

    Scirpus lacustris 'Spiralis'

    see more
  • Family Juncaceae

  • Genus Juncus can be annuals, deciduous or evergreen perennials, forming clumps of narrow, often cylindrical leaves, with clusters of small brown flowers borne on leaf-like stems in summer

  • Details J. effusus f. spiralis is an evergreen perennial forming a clump of corkscrew-like, spirally curled, leafless stems, occasionally with small clusters of brown flowers in summer


  • Foliage Evergreen

  • Habit Tufted

  • 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

  • Partial Shade

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

  • Exposure Sheltered or Exposed


  • Chalk


  • Chalk


  • Chalk


  • MoisturePoorly-drained

  • SoilSand, Clay, Loam

  • pHAcid


  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in permanently moist, acid soil in sun or partial shade. May also be grown in very shallow water at pool margins

Propagation Propagate by division from mid-spring to early summer

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

How to care

Pruning Remove dead foliage and old flowered stems in spring

Pests Generally pest free

Diseases Generally disease free

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