• 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

Magnolia wilsonii

Wilson magnolia

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
Wilson magnolia

© RHS 2002

  • Other common names Wilson magnolia

  • Family Magnoliaceae

  • Genus Magnolia can be deciduous or evergreen trees or shrubs, with large, showy, often fragrant flowers, often opening before the leaves, and sometimes followed by colourful cone-like fruit

  • Details M. wilsonii is a large, spreading deciduous shrub to 6m, with narrowly-ovate leaves. Nodding, cup-shaped white flowers up to 10cm in width, highly scented, with crimson stamens. Fruit 8cm in length, pink

  • Plant range China

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)

    H6

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Clay

    Clay

  • Sand

    Sand

  • Loam

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilClay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 20-50 years

How to grow

Cultivation Grow in moist but well-drained neutral to acid soil in sun or part shade with shelter from cold winds. Will grow in moisture retentive alkaline soils. Further magnolia cultivation advice

Propagation Propagate by seed, semi-hardwood and softwood cuttings

Suggested planting locations and garden types Cut Flowers Low Maintenance Architectural City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Magnolia pruning should be carried out in midsummer when in full leaf

Pests May be damaged by horse chestnut scale, snails and capsid bug

Diseases May be affected by coral spot, grey mould, honey fungus, a virus and fungal leaf spot

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