• 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

Euphorbia amygdaloides var. robbiae

Mrs Robb's bonnet

  • Other common names Mrs Robb's bonnet

  • Synonyms Euphorbia robbiae

  • Family Euphorbiaceae

  • Genus Euphorbia can be annuals, perennials, shrubs or succulents, with milky sap and small flowers held within cupped, often colourful bracts

  • Details E. amygdaloides var. robbiae is a spreading evergreen perennial to 50cm in height, forming colonies of rosettes of oblong, dark green leaves from which arise large rounded sprays of yellow-green flowers

  • Plant range Europe, SW Asia


  • Foliage Evergreen

  • Habit Suckering

  • Toxicity All parts are highly toxic by ingestion

  • 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

  • Full Shade

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

  • Exposure Exposed or Sheltered


  • Chalk


  • Chalk


  • Chalk


  • MoistureMoist but well-drained, Well-drained

  • SoilChalk, Loam, Sand

  • pHAcid, Alkaline, Neutral


  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation An easy-to-grow plant that will cope with most conditions even dry shade. It spreads by rhizomes and can be invasive

Propagation Propagate by division in spring

Suggested planting locations and garden types Flower borders and beds Ground Cover Low Maintenance City & Courtyard Gardens Coastal Cottage & Informal Garden

How to care

Pruning Cut back flowering shoots to ground level in late summer or autumn

Pests Aphids may be a problem

Diseases May be subject to grey moulds

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