• 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

Melianthus major

Honey flower

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
Honey flower

© � RHS 2002

  • Other common names Honey flower
    Honey bush

    Great honey flower

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  • Genus Melianthus are evergreen shrubs, often grown as herbaceous perennials, with handsome pinnate leaves and small, tubular flowers in narrow, erect racemes

  • Family Melianthaceae / Melianthaceae

  • Species M. major is a sparsely branched, medium-sized evergreen sub-shrub of sprawling habit, with handsome glaucous, pinnate leaves to 45cm in length. Small, tubular maroon flowers in erect racemes to 30cm in length in spring and summer

  • Plant range South Africa

Characteristics

  • 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)
    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

    H3

Colour

Sunlight

  • Full Sun

  • Aspect South-facing

  • Exposure Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Loam

  • Chalk

    Chalk

  • Chalk

    Clay

  • MoistureMoist but well-drained

  • SoilSand, Loam, Chalk, Clay

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    1.5-2.5 metres

  • Ultimate spread

    1.5-2.5 metres

  • Time to ultimate height

    5-10 years

How to grow

Cultivation Grow in moderately fertile, moist but well-drained soil in full sun. Shelter from cold, drying winds and provide a dry mulch in winter to protect from excessive winter wet. Alternatively, grow in a container and keep outside over the summer and bring under glass in late autumn

Propagation Propagate by basal softwood cuttings in spring or propagate by division in early spring

Suggested planting locations and garden types Flower borders and beds Wall-side Borders Patio & Container Plants Architectural

How to care

Pruning Pruning group 7 or pruning group 8

Pests May be attacked by glasshouse red spider mite and glasshouse whitefly under glass

Diseases Generally disease free

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