• 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

Primula vulgaris subsp. sibthorpii (Pr/Prim)

Sibthorp primrose

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
Sibthorp primrose

© � RHS

  • Other common names Sibthorp primrose

  • Genus Primula are herbaceous or semi-evergreen perennials, forming a basal rosette of simple leaves, with salver-shaped or bell-shaped flowers which may be solitary or carried in an umbel or in whorls on an erect stem

  • Family Primulaceae / Primulaceae

  • Species P. vulgaris subsp. sibthorpii is a semi-evergreen perennial to to 15cm tall, with a rosette of obovate leaves and clusters of long-stalked purplish-pink flowers 2-3cm wide in early spring

  • Plant range E. Balkan Peninsula

  • Horticultural Group Primroses are rosette-forming herbaceous perennials, sometimes grown as annuals, with clusters of solitary flowers arising from the rosette in late winter or early spring

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Fragrance Flower

  • 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

    H5

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or North-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Loam

  • Chalk

    Clay

  • Chalk

    Chalk

  • MoistureMoist but well-drained, Poorly-drained

  • SoilSand, Loam, Clay, Chalk

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    0.1-0.5 metres

  • Ultimate spread

    0-0.1 metre

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Best planted in dappled shade in humus-rich, moist neutral to acid soil. Tolerates full sun if soil remains moist at all times

Propagation Propagate by seed; take root cuttings when dormant in winter. Divide between autumn and early spring

Suggested planting locations and garden types Garden Edging Flower borders and beds City & Courtyard Gardens Coastal Cottage & Informal Garden Gravel Garden Rock Garden Patio & Container Plants

How to care

Pruning No pruning required

Pests Susceptible to leafhoppers, vine weevil, slugs and snails, caterpillars and aphids

Diseases May be affected by primula brown core, grey mould, primula leaf spot and a virus

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