Magnolia acuminata 'Koban Dori' (Magnolia 'Koban Dori')

Botanical name

Magnolia acuminata 'Koban Dori'

Other names

Magnolia 'Koban Dori', Cucumber tree 'Koban Dori'

Genus

Magnolia Magnolia

Variety or Cultivar

'Koban Dori' _ 'Koban Dori' is a small, conical, deciduous tree with ovate to elliptic, dark green leaves, lighter and softly hairy beneath, and upright, cup-shaped, light yellow flowers as the leaves emerge in late spring and early summer. Flowers are followed by large fruit maturing to pink in late summer and autumn.

Native to

Garden origin

Foliage

Deciduous

Habit

Conical, Upright

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Colour

Flower

Yellow in Spring; Yellow in Summer

Foliage

Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn

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How to care

Watch out for

Specific pests

Capsid bug , Horse chestnut scale , Snails

Specific diseases

Coral spot , Grey mould , Honey fungus , Leaf spot , Virus

General care

Pruning

Pruning group 1 in midsummer.

Propagation methods

Semi-hardwood cuttings, Softwood cuttings

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Monthly care advice

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Where to grow

Magnolia acuminata 'Koban Dori' (Magnolia 'Koban Dori') will reach a height of 7m and a spread of 4m after 10-20 years.

Suggested uses

Architectural, Beds and borders, City, Cottage/Informal

Cultivation

Plant in moist but well-drained, humus-rich, neutral to acid soil in full sun or partial shade. Shelter from cold, drying winds. Flower buds may be damaged by late frost.

Soil type

Loamy, Clay

Soil drainage

Well-drained, Moist but well-drained

Soil pH

Acid, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Magnolia acuminata 'Koban Dori' (Magnolia 'Koban Dori')

Common pest name

Scientific pest name

Phytophthora kernoviae

Type

Oomycete

Current status in UK

Present (Limited)

Likelihood to spread in UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Pathogen of certain tree and shrub species; subject to a containment strategy the UK.

Defra's Risk register #2

Plant name

Magnolia acuminata 'Koban Dori' (Magnolia 'Koban Dori')

Common pest name

Japanese long scale; Japanese maple scale; Long scale; Japanese; Pear white scale

Scientific pest name

Lopholeucaspis japonica

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Regulated only on Citrus at present; regulation on other hosts needs to be considered. Only likely to be a pest under glass in UK.

Defra's Risk register #3

Plant name

Magnolia acuminata 'Koban Dori' (Magnolia 'Koban Dori')

Common pest name

Black timber bark beetle; Smaller alnus bark beetle; tea root borer

Scientific pest name

Xylosandrus germanus

Type

Insect

Current status in UK

Present (Limited)

Likelihood to spread in UK (1 is very low - 5 is very high)

4

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Ambrosia beetle affecting a wide range of trees and woody hosts. Widespread in Europe and elsewhere and now present in the south of England. Impacts can be reduced by good silvicultural practices. Surveillance is being carried out to better determine distribution.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/