• 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

Ipheion uniflorum 'Wisley Blue'

Spring starflower 'Wisley Blue'

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
Spring starflower 'Wisley Blue'

© � RHS 2000

  • Other common names Spring starflower 'Wisley Blue'

  • Genus Ipheion are small bulbous perennials with onion-scented, narrowly strap-shaped leaves and sweet-scented star-shaped flowers in late winter and spring

  • Family Alliaceae / Alliaceae

  • Species 'Wisley Blue' is a perennial to 10cm in height, with narrow, light green leaves and erect stems bearing solitary, fragrant, lilac-blue flowers 3-4cm in width

Characteristics

  • Foliage Deciduous

  • Habit Tufted

  • 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

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

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Chalk

    Clay

  • Chalk

    Sand

  • Chalk

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    Up to 10 cm

  • Ultimate spread

    0-0.1 metre

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Plant 8cm deep in autumn in moderately fertile, humus-rich, well-drained soil that does not dry out. Provide protective winter mulch in colder areas

Propagation Propagate by seed, sown in pots in a cold frame when ripe or by division in summer when dormant

Suggested planting locations and garden types Flower borders and beds Underplanting of Roses and Shrubs City & Courtyard Gardens Cottage & Informal Garden Mediterranean Climate Plants Patio & Container Plants Rock Garden

How to care

Pruning No pruning required

Pests Susceptible to damage by slugs and snails

Diseases Generally disease free

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