• 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

Acacia dealbata

mimosa

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
mimosa

© � Roy Cheek 2003

  • Other common names mimosa
    silver wattle

    blue wattle

    see more
  • Synonyms Acacia decurrens var. dealbata
    Racosperma dealbatum

  • Genus Acacia can be deciduous or evergreen trees, shrubs or climbers, with alternate, pinnately divided leaves or simple modified leaf-like stalks (phyllodes), and tiny, sometimes fragrant, flowers in short spikes, or in racemes or spikes of spherical heads

  • Family Mimosaceae / Mimosaceae

  • Details A. dealbata is an evergreen shrub to 10m or more, with finely divided grey-green leaves and fragrant yellow flowerheads, borne in terminal clusters

  • Plant range Tasmania, Australia

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

    H2

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Chalk

    Loam

  • Chalk

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Sand

  • pHAcid, Alkaline

Size

  • Ultimate height

    8-12 metres

  • Ultimate spread

    2.5-4 metres

  • Time to ultimate height

    10-20 years

How to grow

Cultivation Grow outdoors in neutral to acid soil in sheltered frost-free location. Under glass grow in loam-based compost in full light. Resents hard pruning

Propagation Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types Flower borders and beds Wall-side Borders City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Pruning group 8

Pests Can get glasshouse red spider mite, fluted scale and mealybugs

Diseases Generally disease free

Advertise here

Did you find the information you were looking for?

RHS members can get exclusive individual advice from the RHS Gardening Advice team.

Join the RHS now