• 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

Sisyrinchium striatum

pale yellow-eyed grass

  • Other common names pale yellow-eyed grass
    yellow Mexican satin flower

  • Synonyms Phaiophleps nigricans

  • Family Iridaceae

  • Genus Sisyrinchium can be annuals or rhizomatous perennials forming a clump of narrowly sword-shaped leaves with erect stems carrying solitary or clustered, star-shaped or bell-shaped flowers in spring or summer

  • Details S. striatum is a clump-forming perennial, to 80cm tall, with fans of grey-green, narrow, linear to lance-shaped leaves. In summer, stiff, upright stems carry clusters of pale yellow, star-shaped flowers along their length

  • Plant range Argentina, Chile

Characteristics

  • Foliage Semi-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)

    H4

Colour

Sunlight

  • Full Sun

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Loam

    Loam

  • Sand

    Sand

  • MoistureMoist but well-drained, Well-drained

  • SoilChalk, Loam, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grows best in sun in a well-drained, moist soil. Dislikes wet winters and excessively cold temperatures

Propagation Propagate by seed or by division

Suggested planting locations and garden types Flower borders and beds City & Courtyard Gardens Gravel Garden Cottage & Informal Garden

How to care

Pruning Remove old, blackened foliage after flowering

Pests Generally trouble free

Diseases Generally trouble free

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