• 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

Mahonia oiwakensis subsp. lomariifolia

lomaria-leaved mahonia

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
lomaria-leaved mahonia

© RHS 2002

  • Other common names lomaria-leaved mahonia

  • Synonyms Mahonia lomariifolia

  • Family Berberidaceae

  • Genus Mahonia are evergreen shrubs with leathery, pinnate leaves which are often spine-toothed, and clustered racemes of sometimes fragrant yellow flowers, sometimes followed by black or purple berries

  • Details M. oiwakensis subsp. lomariifolia is an erect large evergreen shrub to 3m, with long, pinnate leaves with spiny leaflets. Flowers bright yellow, slightly scented, in dense, erect, clustered racemes to 25cm in length from late autumn into winter, followed by blue-black berries

  • Plant range SW China, Myanmar

Characteristics

  • Foliage Evergreen

  • 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)

    H4

Colour

Sunlight

  • Partial Shade

  • Full Shade

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

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Clay

    Clay

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Clay, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 1.5-2.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grows well in moderately fertile, humus-rich soil. Will tolerate full sun if the soil is not too dry. Provide shelter from cold, drying winds

Propagation Propagate by seed sown in containers in autumn or as soon as ripe. Stratified seeds germinate freely. Root semi-hardwood cuttings in late summer or autumn

Suggested planting locations and garden types Flower borders and beds Low Maintenance Cottage & Informal Garden

How to care

Pruning Pruning group 8

Pests Generally pest free

Diseases Generally disease free

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