• 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

Androsace studiosorum

rock jasmine

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
rock jasmine

© RHS

  • Other common names rock jasmine

  • Synonyms Androsace primuloides
    Androsace sarmentosa misapplied

    Androsace sarmentosa var. yunnanensis misapplied

    see more
  • Family Primulaceae

  • Genus Androsace can be annuals, biennials or evergreen perennials forming mats or compact cushions, with salver-shaped flowers which may be solitary or in umbels

  • Details A. studiosorum is a mat-forming, evergreen perennial spreading by stolons. The rosettes are covered in silky hairs, and appear more silvery over winter. The flowers are a deep, rich pink with a small yellow eye, borne in generous clusters on red stems in spring

  • Plant range Himalaya

Characteristics

  • Foliage Evergreen

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Exposed or Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height Up to 10 cm

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in a scree bed, in vertical crevices in rock or in moist but gritty, well-drained soil

Propagation Propagate by seed sown in containers in an open cold frame as soon as ripe, or in autumn. Root single rosettes as cuttings in early to mid summer. Keep moist but water from below to avoid wetting the rosettes

Suggested planting locations and garden types Gravel Garden Patio & Container Plants Rock Garden

How to care

Pruning No pruning required

Pests Generally pest free. Prone to aphids under glass

Diseases Vulnerable to fungal disease in damp conditions. Remove dead rosettes to reduce the risk of infection

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

Get involved

We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.