• 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

Stromanthe sanguinea 'Triostar' (PBR) (v)

variegated bloody stromanthe 'Triostar'

  • Other common names variegated bloody stromanthe 'Triostar'

  • Synonyms Calathea 'Triostar'

  • Family Marantaceae

  • Genus Stromanthe are evergreen rhizomatous herbaceous perennials with simple, lance-shaped to ovate leaves and racemes or panicles of cup-shaped white, yellow or red flowers with showy bracts, in winter, spring or summer


  • Foliage Evergreen

  • Habit Bushy

  • 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)




  • Partial Shade

  • Aspect East-facing or North-facing

  • Exposure Sheltered


  • Loam


  • MoistureMoist but well-drained

  • SoilLoam

  • pHAcid, Neutral


  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow under glass in a peat free or loam-based potting compost in bright, filtered light. Water freely when in growth, maintain high humidity and apply a low nitrogen liquid fertiliser every 2 or 3 weeks. Water moderately in winter

Propagation Propagate by division in spring

Suggested planting locations and garden types Patio & Container Plants

How to care

Pruning None required

Pests Glasshouse red spider mite can be a nuisance

Diseases Generally disease free

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