• 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

Rheum palmatum

Chinese rhubarb

Chinese rhubarb

© RHS

  • Other common names Chinese rhubarb
    ornamental rhubarb

    palmate rhubarb
    Turkey rhubarb
    Turkish rhubarb

    see more
  • Family Polygonaceae

  • Genus Rheum are robust rhizomatous herbaceous perennials with large, simple or palmately lobed leaves and tall leafy stems bearing large panicles of tiny flowers

  • Details R. palmatum is a clump-forming perennial. With large, lobed leaves up to 75cm long and panicles of pink or creamy-white flowers that rise on 2m long stems in early Summer, this ornamental rhubarb is an architectural plant that demands space

  • Plant range China

Characteristics

  • Foliage Deciduous

  • Habit Columnar/Upright

  • Toxicity May cause severe discomfort 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)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Exposed or Sheltered

Soil

  • Loam

    Loam

  • Clay

    Clay

  • MoistureMoist but well-drained

  • SoilLoam, Clay

  • pHAcid, Neutral

Size

  • Ultimate height 1.5-2.5 metres

  • Ultimate spread 1.5-2.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Requires a fertile, moisture-retentive soil. Mulch in winter to help retain moisture

Propagation Propagate by seed or division in Spring

Suggested planting locations and garden types Flower borders and beds Architectural Cottage & Informal Garden Wildlife Gardens

How to care

Pruning Deadhead spikes after flowering

Pests Generally trouble free, but may be susceptible to blackfly (black aphids)

Diseases Generally trouble free

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