Arabis alpina subsp. caucasica 'Arctic Joy' (Mountain rock cress 'Arctic Joy')

Botanical name

Arabis alpina subsp. caucasica 'Arctic Joy'

Other names

Mountain rock cress 'Arctic Joy', Alpine rock cress 'Arctic Joy'

Genus

Arabis Arabis

Variety or Cultivar

'Arctic Joy' _ 'Arctic Joy' is a mat-forming, evergreen perennial forming loose rosettes of oval, toothed, dark grey-green leaves with creamy-white margins and short, upright stems bearing racemes of fragrant, four-petalled, white flowers in spring.

Foliage

Evergreen

Habit

Mat Forming, Rosette

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Colour

Flower

White in Spring

Foliage

Cream, Grey-green, Variegated in All seasons

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How to care

Watch out for

Specific pests

Aphids , Gall midges

Specific diseases

Downy mildew , White blister

General care

Pruning

Cut back after flowering to maintain compactness.

Propagation methods

Softwood cuttings

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Monthly care advice

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Where to grow

Arabis alpina subsp. caucasica 'Arctic Joy' (Mountain rock cress 'Arctic Joy') will reach a height of 0.15m and a spread of 0.35m after 2-5 years.

Suggested uses

Containers, Garden edging, Gravel, Ground Cover, Rock, Wildflower

Cultivation

Grow in well-drained soil in full sun. Tolerates hot, dry conditions and poor soils.

Soil type

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

Soil drainage

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)

USDA zones

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

Defra's Risk register #1

Plant name

Arabis alpina subsp. caucasica 'Arctic Joy' (Mountain rock cress 'Arctic Joy')

Common pest name

Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly

Scientific pest name

Bemisia tabaci non-European populations

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

Non-European populations of Bemisia tabaci pose an additional risk to European populations due to the potential for introducing non-European viruses.

Defra's Risk register #2

Plant name

Arabis alpina subsp. caucasica 'Arctic Joy' (Mountain rock cress 'Arctic Joy')

Common pest name

Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly

Scientific pest name

Bemisia tabaci European populations

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

The UK has a protected zone in place for this pest which helps to mitigate the risk of entry and establishment. An EFSA opinion is currently being discussed at the EU Annexes Working Group which recommends further strengthening of the regulation.

Defra's Risk register #3

Plant name

Arabis alpina subsp. caucasica 'Arctic Joy' (Mountain rock cress 'Arctic Joy')

Common pest name

Lance nematode; Nematode; Lance

Scientific pest name

Hoplolaimus spp.

Type

Nematode

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

Nematode species potentially affecting a wide variety of crops; prohibition of soil likely to mitigate risk substantially; keep under review in light of interceptions or findings should they occur in the EU.

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/