• AGM plants

    AGM plants have been through a rigourous 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 obovata Thunb.

Japanese big-leaf magnolia

Japanese big-leaf magnolia

© � RHS 2003

  • Other common names Japanese big-leaf magnolia

  • Synonyms Magnolia hypoleuca

  • 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

  • Family Magnoliaceae / Magnoliaceae

  • Species M. obovata is a vigorous large deciduous tree with handsome obovate leaves up to 45cm in length. Flowers 20cm in width, creamy-white with crimson stamens, very fragrant. Fruit to 20cm in length, cone-like, bright red

  • Plant range Russian Kuril Islands to Japan

Characteristics

  • Foliage Deciduous

  • Habit Spreading _ Branched#Spreading / Branched

  • Fragrance Flower

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Loam

  • Chalk

    Clay

  • Chalk

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Clay, Sand

  • pHAcid, Neutral

Size

  • Ultimate height

    Higher than 12 metres

  • Ultimate spread

    wider than 8 metres

  • Time to ultimate height

    20-50 years

How to grow

Cultivation Grow in moist but well-drained soil in full sun or part shade with shelter from cold winds. Further magnolia cultivation advice

Propagation Propagate by seed in autumn and spring, softwood cuttings in early summer or semi-hardwood cuttings in late summer

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, fungal leaf spot or iron deficiency and lime-induced chlorosis

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