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Magnolia kobus

northern Japanese magnolia

Broadly conical, deciduous tree to 10m tall, with mid-green leaves to 15cm long, and fragrant, goblet to saucere-shaped, white flowers to 10cm wide, in mid-spring, followed by pink fruits splitting to reveal scarlet seeds

Synonyms
Magnolia kobus var. borealis
Magnolia praecocissima
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Size
Ultimate height
8–12 metres
Time to ultimate height
10–20 years
Ultimate spread
4–8 metres
Growing conditions
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Neutral, Alkaline
Colour & scent
StemFlowerFoliageFruit
Spring White Green
Summer Green Pink
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

West–facing or East–facing or South–facing

Exposure
Sheltered
Hardiness
H6
Botanical details
Family
Magnoliaceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy
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

Name status

Correct

Plant range
Japan, Korea

How to grow

Cultivation

Thrives in moist but well-drained, neutral to acid soil, though this species will tolerate slightly alkaline soils as long as they are not too dry. Position in full sun or part shade with shelter from cold winds. Late frosts may damage flower buds. See magnolia cultivation for more advice

Propagation

Propagate by seed in autumn and spring, softwood cuttings from late spring to early summer or semi-ripe cuttings in late summer or autumn

Suggested planting locations and garden types
  • Architectural
  • Cottage and informal garden
Pruning

Minimal pruning required, see magnolia pruning. Deciduous magnolias should only be pruned between midsummer and early autumn

Pests

May be susceptible to scale insects, horse chestnut scale and capsid bug

Diseases

May be susceptible to coral spot, phytophthora, grey moulds, honey fungus, a virus or fungal leaf spot

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