Abies koreana 'Blue Emperor' (Korean fir 'Blue Emperor')

Botanical name

Abies koreana 'Blue Emperor'

Other names

Korean fir 'Blue Emperor'

Genus

Abies Abies

Variety or Cultivar

'Blue Emperor' _ 'Blue Emperor' is a compact, conical, evergreen, coniferous shrub or small tree with horizontal branches bearing needle-like, dark green leaves, curled upward to show the silvery-white undersides. Erect, cylindrical, dark blue cones form on juvenile plants.

Native to

Garden origin

Foliage

Evergreen

Habit

Compact, Conical

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Colour

Foliage

Dark-green, Silvery-grey in All seasons

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How to care

Watch out for

Specific pests

Adelgids , Aphids

Diseases

Generally disease-free.

General care

Pruning

No pruning is needed.

Propagation

Sow seed in a cold frame in autumn or winter. Stratify for 21 days to promote germination.

Propagation methods

Grafting, Seed

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Monthly care advice

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Where to grow

Abies koreana 'Blue Emperor' (Korean fir 'Blue Emperor') will reach a height of 3m and a spread of 2.5m after 10-20 years.

Suggested uses

Architectural, Containers, Cottage/Informal, Gravel, Low Maintenance, Rock

Cultivation

Plant in moist but well-drained slightly acidic soil.

Soil type

Clay, Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Neutral

Light

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 7, Zone 6, Zone 5

Defra's Risk register #1

Plant name

Abies koreana 'Blue Emperor' (Korean fir 'Blue Emperor')

Common pest name

Dothistroma needle blight; Red band needle blight

Scientific pest name

Dothistroma septosporum

Type

Fungus

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)

5

General biosecurity comments

Fungal pest of pine; already present in UK of particular concern in Scotland

Defra's Risk register #2

Plant name

Abies koreana 'Blue Emperor' (Korean fir 'Blue Emperor')

Common pest name

Scientific pest name

Ips subelongatus

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)

5

General biosecurity comments

Pest of conifers with EU regulation helping to mitigate against the entry on conifer wood from non-European sources. Also present in European Russia with a similar range to Ips typographus; for which the UK has a protected zone with requirements on conifer wood.

Defra's Risk register #3

Plant name

Abies koreana 'Blue Emperor' (Korean fir 'Blue Emperor')

Common pest name

Bud worm; western black-headed; Western black-headed budworm

Scientific pest name

Acleris gloverana

Type

Insect

Current status in UK

Absent

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

1

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

5

General biosecurity comments

Effectively mitigated by current regulations prohibiting imports of the hosts from the country of origin.

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/