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Magnolia kobus

Magnolia kobus

3,6/5
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Received height 150 excluding pot for an order of height 180/200 cm (71/79in) in a 7.5L/10L pot. Ref 781522.

Benjamin, 22/12/2020

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This plant carries a 24 months recovery warranty

More information

This beautiful magnolia bears large, slightly fragrant white flowers in March-April on its still bare branches. With age, it forms a tree with a broad crown, best reserved for large gardens. Hardy down to −20 °C, it tolerates moderately chalky soils. Young plants may take several years to flower.
Flower size
10 cm
Height at maturity
10 m
Spread at maturity
9 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -20.5°C
Dry resistance
Average
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Best planting time March, October
Recommended planting time February to May, September to November
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Flowering time March to April
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Description

Magnolia kobus, the northern Japanese magnolia, produces a generous display of white flowers on its bare branches in early spring. It is a large deciduous magnolia that also stands out for its tolerance of slightly chalky soils, which means it can be grown in many regions. Over the years, it becomes more substantial and increasingly magnificent. Plant it as a solitary specimen in a garden large enough to accommodate it.

Magnolia kobus belongs to the Magnoliaceae family. This botanical species, native to Japan and Jeju Island in South Korea, grows in woodland habitats, particularly in hilly and mountainous regions, often in valleys, on deep, fertile, humus-rich soils that remain moist. It is also known by the synonym Yulania kobus. Initially pyramidal, the tree gradually develops a rounded to spreading crown, borne on a trunk or several large branches arising from the base. Its growth is moderate. In gardens, it reaches 8 to 12 m in height and spreads 6 to 8 m; older specimens may exceed these dimensions. The grey bark and silky-haired flower buds are clearly visible during winter. The leaves, oval to obovate, measure up to 15 cm in length. Green on the upper surface and paler underneath, they turn yellow in autumn before falling. This magnolia flowers in March-April depending on the climate, before the leaves appear. The flowers measure 8 to 10 cm across. They usually have six large white tepals, accompanied by three small outer parts. Their scent is light and varies from one specimen to another. Flowering becomes spectacular with age: seedlings sometimes take more than ten years to flower for the first time. Elongated fruits may then form; they open when ripe, revealing red seeds. The tree tolerates down to −20 °C, but its flowers are susceptible to spring frosts. Its hardiness and ability to adapt to different soils also make it useful as a rootstock for other magnolias.

The northern Japanese magnolia is well suited to large romantic gardens, Japanese-inspired gardens and parks. It can be planted as a solitary specimen on a lawn or incorporated into a large planting of trees and shrubs. In rather acidic soil, pair it with snowy mespilus, Viburnum plicatum 'Mariesii' and Cornus alba 'Sibirica'. The flowering periods follow one another, then autumn foliage and the red branches of the dogwood take over. You can plant spring bulbs beneath its branches: Siberian squills 'Spring Beauty', with intense blue bells, and 'Ice Follies' daffodils, white with pale yellow trumpets, accompany its flowering in March-April.

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Magnolias: planting, pruning and care
Family sheet
by Virginie T. 15 min.
Magnolias: planting, pruning and care
Read article

Magnolia kobus in pictures

Magnolia kobus (Flowering) Flowering
Magnolia kobus (Foliage) Foliage

Plant habit

Height at maturity 10 m
Spread at maturity 9 m
Habit spreading
Growth rate normal

Flowering

Flower colour white
Flowering time March to April
Inflorescence Solitary
Flower size 10 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Magnolia

Species

kobus

Family

Magnoliaceae

Botanical synonyms

Yulania kobus

Origin

Southeast Asia

Product reference • 7815221

Planting and care

Magnolia kobus appreciates deep, humus-rich, moisture-retentive soil, in sun or partial shade. Loamy soils are favourable; clay soils are tolerated provided that water drains away properly. It tolerates moderately alkaline soil, but not very chalky ground. A position sheltered from strong winds protects the branches and flowers. Plant in September-October or in early spring in cold regions. Handle the rootball carefully to protect the fragile roots, and keep the root collar level with the soil. Water regularly during the first few years to help it establish. Organic mulch is useful for retaining soil moisture and reducing the need for watering.

Planting period

Best planting time March, October
Recommended planting time February to May, September to November

Intended location

Suitable for Meadow
Type of use Free-standing
Hardiness Hardy down to -20.5°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Exposure Sun, Partial shade
Soil pH Any
Soil type Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light)
Soil moisture Moist soil, deep, rich and well-drained

Care

Pruning instructions Pruning is not necessary. Limit it to removing dead wood and, if necessary, a few poorly positioned branches. Avoid hard pruning this tree to preserve its natural habit.
Pruning Pruning recommended once a year
Pruning time March to April
Soil moisture Moist soil
Dry resistance Average
Disease resistance Good
Overwinter Can be left in the ground
3,6/5

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