• 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

× Achimenantha 'Inferno'

achimenantha 'Inferno'

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
achimenantha 'Inferno'

© RHS

  • Other common names achimenantha 'Inferno'

  • Family Gesneriaceae

  • Genus × Achimenantha are rhizomatous herbaceous perennials with simple, hairy, ovate leaves and brightly coloured, tubular flowers in axillary clusters in summer

  • Details 'Inferno' is an upright, rhizomatous perennial with hairy, oval, dark green leaves, dark purple stems and bright red tubular flowers with a yellow eye veined in red

Characteristics

  • Foliage Deciduous

  • 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)

    H1B

Colour

Sunlight

  • Full Sun

  • Aspect West-facing or East-facing

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilLoam

  • 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 under glass in bright filtered light and moderate humidity. Water sparingly in spring, moderately in summer with quarter strength liquid feed, then reduce after flowering until growth dies back. Store the rhizomes in dry, frost-free conditions

Propagation Propagate by division of rhizomes

Suggested planting locations and garden types Patio & Container Plants Sub-tropical

How to care

Pruning No pruning required

Pests Aphids, glasshouse red spider mite, and western flower thrips may be a problem

Diseases Generally problem free

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