• 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

Chiastophyllum oppositifolium

lamb's tail

lamb's tail

© RHS 2002

  • Other common names lamb's tail

  • Synonyms Chiastophyllum oppositifolium
    Chiastophyllum simplicifolia

    Chiastophyllum simplicifolium
    Cotyledon oppositifolia
    Cotyledon simplicifolia

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  • Family Crassulaceae

  • Genus Chiastophyllum is a mat-forming succulent perennial with broad, fleshy leaves and racemes of small bell-shaped flowers in late spring and early summer

  • Details C. oppositifolium is a prostrate evergreen perennial to 20cm, with large, fleshy, ovate leaves and branched, arching racemes of small, bright yellow flowers on brownish stems

  • Plant range Caucasus


  • Foliage Evergreen

  • Habit Mat forming

  • 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)




  • Partial Shade

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

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • MoistureMoist but well-drained

  • SoilLoam, Chalk, Sand

  • pHAcid, Alkaline, Neutral


  • 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 moist but well-drained, poor to moderately fertile soil in partial shade

Propagation Propagate by seed or use side shoots for softwood cuttings in summer

Suggested planting locations and garden types Garden Edging Ground Cover City & Courtyard Gardens Cottage & Informal Garden Gravel Garden Rock Garden

How to care

Pruning No pruning required

Pests Can be damaged by slugs and snails

Diseases Generally disease free

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