• AGM plants

    AGM plants have been through a rigourous 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

Arum italicum subsp. italicum 'Marmoratum'

Italian arum 'Marmoratum'

AGM plants

AGM plants have been through a rigourous 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
Italian arum 'Marmoratum'

© � RHS 2000

  • Other common names Italian arum 'Marmoratum'

  • Synonyms Arum italicum marmoratum
    Arum italicum 'Pictum'

    Arum italicum var. pictum

    see more
  • Genus Arum are tuberous perennials with simple, arrow-head shaped leaves and tiny flowers hidden, at the base of a yellow or purple, club-shaped spadix, within a showy, hood-like spathe, and followed by red berries

  • Family Araceae / Araceae

  • Species 'Marmoratum' is a tuberous perennial to 35cm, with large, arrow-shaped dark, glossy green leaves veined creamy-white and appearing in autumn. Large greenish-yellow spathes with a yellow spadix are followed by showy spikes of orange-red berries

Characteristics

  • Foliage Semi-evergreen

  • Habit Columnar_Upright#Columnar/Upright

  • 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)
    Old hardiness ratings

    While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.

    • H1 - Requires heated glass
    • H2 - Requires unheated glass
    • H3 - Hardy outside in some regions of the UK
    • H4 - Hardy throughout the UK
    • H1 + H3 - Requires heated glass but may be grown outside in summer

    For full details of the hardiness ratings see

    see more

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Loam

  • Chalk

    Chalk

  • Chalk

    Sand

  • MoistureWell-drained

  • SoilLoam, Chalk, Sand

  • pHAcid, Alkaline, 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 moist but well-drained humus-rich soil and plant 10 to 15cm deep

Propagation Division of clumps of tubers should take place after flowering. Alternatively, propagate by seed sown in autumn having removed the fleshy pulp

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

How to care

Pruning No pruning required

Pests Generally pest free

Diseases Generally disease free

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