• 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 grandiflora 'Goliath'

evergreen magnolia 'Goliath'

  • Other common names evergreen magnolia 'Goliath'

  • 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 'Goliath' is a rounded evergreen tree or large shrub to 15m tall, with glossy, leathery dark green leaves to 25cm long, and highly fragrant, cup-shaped, cream flowers to 30cm wide in late summer and autumn

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)

    H5

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Clay

    Clay

  • Loam

    Loam

  • Chalk

    Chalk

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Clay, Loam, Chalk

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height Higher than 12 metres

  • Ultimate spread 4-8 metres

  • Time to ultimate height 20-50 years

How to grow

Cultivation Grow in moist, well-drained preferably neutral to acid soil in sun or part shade. Tolerates dry, alkaline soil. Further magnolia cultivation advice

Propagation Propagate by softwood and greenwood cuttings in early summer, semi-hardwood cuttings in late summer to early winter and layering in early spring

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

How to care

Pruning Pruning group 1 in spring as growth begins. Pruning group 13 in summer if wall trained

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

Diseases Coral spot or honey fungus may be a problem

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