Magnolia acuminata 'Seiju'
A large deciduous tree, with a conical habit and large, mid-green, oval-shaped leaves, with pale, slightly downy undersides and pointed tips. Flowers are waxy blue-green on the outside, opening to yellow inner petals, and are produced after the leaves in spring
Size
Ultimate height
Higher than 12 metresTime to ultimate height
20–50 yearsUltimate spread
Wider than 8 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Blue Green Yellow | Green | ||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | Green Yellow | |||
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H6Botanical details
- Family
- Magnoliaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Columnar upright, 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
Accepted
How to grow
Cultivation
Thrives in moist but well-drained, neutral to acid soil, 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 softwood cuttings in early summer or by semi-ripe cuttings in late summer
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 and capsid bug
Diseases
May be susceptible to coral spot, phytophthora, grey moulds, honey fungus, virus diseases or fungal leaf spot
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.