• 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 'Whistleberry Garnet'

spurge 'Whistleberry Garnet'

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
spurge 'Whistleberry Garnet'

© RHS

  • Other common names spurge 'Whistleberry Garnet'

  • Synonyms Euphorbia characias 'Whistleberry Garnet'

  • Family Euphorbiaceae

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

  • Details 'Whistleberry Garnet' is a compact, evergreen perennial, typically up to 70 × 80 cm, with red-flushed leaves and stems, and yellow-green flowers with a bright red eye in spring

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • 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)

    H7

Colour

Sunlight

  • Full Sun

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

  • Exposure Sheltered or Exposed

Soil

  • Sand

    Sand

  • Loam

    Loam

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in well-drained, light soil in full sun. May spread but is easy to control

Propagation Propagate by division in spring, or by basal cuttings in spring or early summer; dip cut surfaces in charcoal or lukewarm water to prevent bleeding

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

How to care

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

Pests May be affected by aphids

Diseases May be affected by stem and root rots in wet conditions

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