• 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

Pittosporum tenuifolium 'Silver Sheen' (m)

tawhiwhi 'Silver Sheen'

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  • Other common names tawhiwhi 'Silver Sheen'

  • Family Pittosporaceae

  • Genus Pittosporum are evergreen shrubs or trees with simple, leathery leaves and small, often fragrant, 5-petalled flowers, followed by spherical, woody fruits splitting to reveal seeds embedded in sticky pulp

  • Details 'Silver Sheen' is a columnar, fairly open-growing large shrub or small tree, up to 5m high, with dark reddish-purple stems, and very small, pale green ovate leaves with a greyish-silver sheen. Male, scented, dark brown-maroon flowers appear in late spring or early summer


  • Foliage Evergreen

  • Habit Columnar/Upright

  • 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)




  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered


  • Chalk


  • Clay


  • Loam


  • Sand


  • MoistureMoist but well-drained

  • SoilChalk, Clay, Loam, Sand

  • pHAcid, Alkaline, Neutral


  • Ultimate height 4-8 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow in fertile, moist but well-drained soil, in full sun - will grow in partial shade, but the leaves will be most colourful and wood will ripen better in an open sunny position. Grow in the open in milder areas and in coastal gardens with shelter from the worst cold, drying winds, while in colder gardens grow in a sheltered position such as a south- or west-facing wall, and protect roots in winter with a deep dry mulch

Propagation Propagate by semi-ripe basal cuttings in summer, by basal hardwood cuttings in late autumn, or by layering or air layering in spring

Suggested planting locations and garden types Hedging & Screens Low Maintenance Wall-side Borders City & Courtyard Gardens Coastal Cottage & Informal Garden Mediterranean Climate Plants

How to care

Pruning Pruning group 1; if grown as a hedge, trim in spring and midsummer

Pests May be affected by pittosporum sucker

Diseases May be affected by leaf spot and powdery mildews

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