Juniperus communis 'Hibernica' (Irish juniper)

Botanical name

Juniperus communis 'Hibernica'

Other names

Irish juniper, Juniperus communis var. hemisphera 'Hibernica'

Genus

Juniperus Juniperus

Variety or Cultivar

'Hibernica' _ 'Hibernica' is a large, dense, evergreen, coniferous shrub with erect branches and a columnar habit. It bears needle-like, grey-green foliage.

Foliage

Evergreen

Habit

Ascending branches, Dense, Narrowly columnar

Toxicity

Foliage may cause skin irritation.

Awards

RHS AGM (Award of Garden Merit)

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Colour

Foliage

Grey-green in All seasons

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How to care

Watch out for

Specific pests

Aphids , Caterpillars , Juniper scale

Specific diseases

Canker

General care

Pruning

Little to no pruning required.

Propagation methods

Semi-hardwood cuttings

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Monthly care advice

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Where to grow

Juniperus communis 'Hibernica' (Irish juniper) will reach a height of 4m and a spread of 0.5m after 20-50 years.

Suggested uses

Architectural, Low Maintenance, Resistant to pollution

Cultivation

Plant in any well-drained soil. Can tolerate hot sunny sites.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

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

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5

Defra's Risk register #1

Plant name

Juniperus communis 'Hibernica' (Irish juniper)

Common pest name

Cedar-Quince rust; Quince rust; Rust of apple; Rust of juniper; Rust of quince

Scientific pest name

Gymnosporangium clavipes

Type

Fungus

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

EU regulated rust disease which helps mitigate against introduction. A review of EU regulations will help to ensure that all hosts are regulated.

Defra's Risk register #2

Plant name

Juniperus communis 'Hibernica' (Irish juniper)

Common pest name

Scientific pest name

Lamprodila festiva

Type

Insect

Current status in UK

Absent

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

5

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

3

General biosecurity comments

Beetle that is native to Europe; whose larvae damage certain ornamental conifer species. Absent in the UK; so industry should source plants carefully and monitor for its presence.

Defra's Risk register #3

Plant name

Juniperus communis 'Hibernica' (Irish juniper)

Common pest name

Cypress twig; borer

Scientific pest name

Argyresthia cupressella

Type

Insect

Current status in UK

Present (Widespread)

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

3

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

3

General biosecurity comments

Has spread following introduction; little evidence of significant damage. Stakeholder groups may wish to monitor.

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/