• 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

Epimedium × versicolor 'Sulphureum'

barrenwort 'Sulphureum'

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
  • Other common names barrenwort 'Sulphureum'

  • Synonyms Epimedium × youngianum 'Sulphureum'
    Epimedium macranthum 'Sulphureum'

    Epimedium luteum
    Epimedium sulphureum

    see more
  • Family Berberidaceae

  • Genus Epimedium are rhizomatous perennials with evergreen or deciduous, ternately or pinnately divided leaves, and open sprays of small, bowl-shaped flowers, often with prominent spurs, in mid to late spring

  • Details 'Sulphureum' is an evergreen perennial, to 35cm in height, forming a clump of red-tinted, light green leaves. Primrose-yellow flowers, 2cm in width, are carried in open sprays

Characteristics

  • Foliage Deciduous

  • Habit Spreading / Branched

  • 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 Shade

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Loam

    Loam

  • Sand

    Sand

  • MoistureMoist but well-drained, Well-drained

  • SoilChalk, Loam, Sand

  • pHAcid, Neutral

Size

  • 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 fertile, moist but well-drained, humus-rich soil in partial shade; shelter from cold, dry winds. Can tolerate full sun, full shade or slightly drier soils

Propagation Propagate by division in autumn or after flowering

Suggested planting locations and garden types Flower borders and beds Ground Cover Banks and Slopes Underplanting of Roses and Shrubs Rock Garden

How to care

Pruning Pruning is unnecessary. Evergreen foliage can be sheared over in early spring to tidy old leaves and show off the flowers but in cold gardens this may expose new growth to frost damage

Pests Prone to vine weevils

Diseases May be affected by a virus

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