• 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

Cerastium tomentosum

dusty miller

dusty miller

© RHS 2003

  • Other common names dusty miller

    Jerusalem star
    snow plant
    wooly mouse-ear chickweed

    see more
  • Family Caryophyllaceae

  • Genus Cerastium can be annuals or mat-forming perennials, with simple leaves and star-shaped 5-petalled white flowers

  • Details C. tomentosum is a vigorous mat-forming perennial to 15cm in height, with narrow, white-hairy leaves and star-shaped white flowers 2cm across, with notched petals, in late spring and summer

  • Plant range Eur. & W As. (mts)


  • Foliage Deciduous

  • Habit Mat forming

  • 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)




  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered or Exposed


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureWell-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral


  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Ideal plant for carpeting dry, sunny banks or gravel gardens

Propagation Propagate by seed, division or stem tip cuttings

Suggested planting locations and garden types Flower borders and beds Ground Cover Banks and Slopes Gravel Garden

How to care

Pruning No pruning required

Pests Generally pest free

Diseases Generally disease free

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