• 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

Paeonia officinalis 'Rubra Plena' (d)

peony 'Rubra Plena'

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
peony 'Rubra Plena'

© RHS

  • Other common names peony 'Rubra Plena'

  • Family Paeoniaceae

  • Genus Paeonia may be herbaceous perennials or deciduous sub-shrubs with large, divided leaves and showy large bowl-shaped flowers, usually in early summer

  • Details 'Rubra Plena' is a robust herbaceous perennial to 75cm in height, with dark green, divided leaves and fully double rich crimson flowers 15-20cm across

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • Toxicity All parts can cause stomach upset if ingested

  • 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

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Clay

  • Chalk

    Loam

  • Chalk

    Chalk

  • Chalk

    Sand

  • MoistureMoist but well-drained

  • SoilClay, Loam, Chalk, Sand

  • 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 Best in a deep, fertile, humus-rich soil that is moist but well-drained in a sheltered position in full sun or partial shade. May need support

Propagation Propagate by division in autumn or early spring

Suggested planting locations and garden types Flower borders and beds Underplanting of Roses and Shrubs Cut Flowers Cottage & Informal Garden

How to care

Pruning Remove dead flowers as they fade, then cut back plant after the foliage has died down in autumn

Pests Can get leaf and bud eelworms and caterpillars

Diseases May be subject to a virus, honey fungus and peony wilt

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