• 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 'David Clulow'

magnolia 'David Clulow'

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 'David Clulow'

© RHS 1999

  • Other common names magnolia 'David Clulow'

  • 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 'David Clulow' is a deciduous tree or large shrub to 6m tall, with large, simple, ovate or elliptic leaves and white cup-shaped flowers to 20cm wide in late spring, the broad tepals flushed with pale pink at the base

Characteristics

  • Foliage Deciduous

  • 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)

    H5

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Clay

    Clay

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Clay, Loam

  • pHAcid, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow in moist, humus-rich, well-drained neutral to acid soil in sun or partial shade with shelter from cold winds. Late frosts may damage flower buds. Further magnolia cultivation advice

Propagation Propagate by softwood or greenwood cuttings in early summer or semi-hardwood cuttings in late summer to early winter

Suggested planting locations and garden types Flower borders and beds Wall-side Borders City & Courtyard Gardens Cottage & Informal Garden

How to care

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

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

Diseases May be affected by coral spot, grey mould, honey fungus, a virus, fungal leaf spot or iron deficiency and lime-induced chlorosis

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