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Thuja occidentalis 'Holmstrup' (White cedar 'Holmstrup')

Beginner
skill rating
1 hour care
per year
4m
Max height
2.5m
Max spread
20-50 years
To maturity
Low
Toxicity

Plant details

Botanical name

Thuja occidentalis 'Holmstrup'

Other names

White cedar 'Holmstrup'

Genus

Thuja Thuja

Variety or Cultivar

'Holmstrup' _ 'Holmstrup' is a dense, conical, evergreen, coniferous shrub with upright sprays of aromatic, dark green, scale-like leaves and small, oval female cones with smooth scales.


Thuja occidentalis 'Holmstrup' is: Evergreen

Fragrance

Foliage smells of pineapple when crushed.

Habit

Conical

Toxicity

Contact with the skin may cause irritation.

Awards

RHS AGM (Award of Garden Merit)

Foliage

Green in All seasons

How to care

Watch out for

Specific pests

Conifer aphid , Scale insects Conifer aphid , Scale insects

Cypress (coryneum) canker Cypress (coryneum) canker

General care

Propagation methods

Semi-hardwood cuttings


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Where to grow

Thuja occidentalis 'Holmstrup' (White cedar 'Holmstrup') will reach a height of 4m and a spread of 2.5m after 20-50 years.

Suggested uses

Containers, Low Maintenance, Rock

Cultivation

Plant in moist, free-draining soil in any aspect so long as it gets good light. Needs protection from drying winds, particularly when young.

Soil type

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

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

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)

Companion plants

Botanical name

Thuja occidentalis 'Holmstrup'

Other names

White cedar 'Holmstrup'

Genus

Thuja Thuja

Variety or Cultivar

'Holmstrup' _ 'Holmstrup' is a dense, conical, evergreen, coniferous shrub with upright sprays of aromatic, dark green, scale-like leaves and small, oval female cones with smooth scales.

Foliage

Evergreen

Fragrance

Foliage smells of pineapple when crushed.

Habit

Conical

Toxicity

Contact with the skin may cause irritation.

Awards

RHS AGM (Award of Garden Merit)


Colour

Foliage

Green in All seasons


How to care

Watch out for

Specific pests

Conifer aphid , Scale insects

Specific diseases

Cypress (coryneum) canker

General care

Propagation methods

Semi-hardwood cuttings


Monthly care advice


Where to grow

Thuja occidentalis 'Holmstrup' (White cedar 'Holmstrup') will reach a height of 4m and a spread of 2.5m after 20-50 years.

Suggested uses

Containers, Low Maintenance, Rock

Cultivation

Plant in moist, free-draining soil in any aspect so long as it gets good light. Needs protection from drying winds, particularly when young.

Soil type

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

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

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)

Defra's Risk register #1

Plant name

Thuja occidentalis 'Holmstrup' (White cedar 'Holmstrup')

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 #2

Plant name

Thuja occidentalis 'Holmstrup' (White cedar 'Holmstrup')

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.

Defra's Risk register #3

Plant name

Thuja occidentalis 'Holmstrup' (White cedar 'Holmstrup')

Common pest name

Western hemlock wood stainer

Scientific pest name

Gnathotrichus sulcatus

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)

3

General biosecurity comments

EU regulated pest of conifers and regulations appear to be effectively mitigating against the risk of entry.

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

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This plant likes... Garden match
Soil types: Chalky, Clay, Loamy, Sandy (will tolerate most soil types) Tell us...
Soil drainage: Moist but well-drained, Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Full Sun Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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