Rosa rugosa 'Alba' (White Japanese rose)

Botanical name

Rosa rugosa 'Alba'

Other names

White Japanese rose, Japanese rose 'Alba', White hedgerow rose, Hedgerow rose 'Alba', Ramanas rose 'Alba', Tomato rose 'Alba', Turkestan rose 'Alba'

Genus

Rosa Rosa

Variety or Cultivar

'Alba' _ 'Alba' is a vigorous, upright, bushy shrub with thorny stems bearing pinnate leaves divided into ovate, glossy, wrinkled, dark green leaflets and, in summer and autumn, clusters of pale pink buds opening to single, fragrant, white flowers followed by large, scarlet hips.

Foliage

Deciduous

Habit

Bushy, Upright

Colour

Flower

White in Summer; White in Autumn

Foliage

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

How to care

Watch out for

Specific pests

Aphids , Caterpillars , Deer , Glasshouse red spider mite , Leafhoppers , Rabbits , Rose leaf-rolling sawfly , Scale insects

Specific diseases

Downy mildew , Powdery mildew , Rose black spot , Rose rust

General care

Pruning

Rose pruning group 20.

Propagation methods

Budding, Hardwood cuttings

Monthly care advice

Where to grow

Rosa rugosa 'Alba' (White Japanese rose) will reach a height of 1.8m and a spread of 1.5m after 2-5 years.

Suggested uses

Beds and borders, Cottage/Informal, Flower Arranging, Hedging/Screens

Cultivation

Grow in fertile, humus-rich, moist but well-drained soil in full sun. Feed and mulch in late winter or early spring. Tolerates partial shade and poor soil. Avoid planting in sites that have previously been used for growing roses.

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

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 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Rosa rugosa 'Alba' (White Japanese rose)

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

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

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Rosa rugosa 'Alba' (White Japanese rose)

Common pest name

Apple root knot nematode

Scientific pest name

Meloidogyne mali

Type

Nematode

Current status in UK

Unknown

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

3

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

4

General biosecurity comments

UK (along with certain other European countries) received potentially infested trees in 1992; but these were destroyed at the end of the trial period and targeted surveillance has failed to find any trace of the nematode. Main impacts are on elm; apple and mulberry and industry should source such material carefully.

Defra's Risk register #3

Plant name

Rosa rugosa 'Alba' (White Japanese rose)

Common pest name

Scientific pest name

Rose Rosette Virus

Type

Virus or Viroid

Current status in UK

Absent

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

3

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

4

General biosecurity comments

Pest of economical and socially important host in the UK; which is currently absent. If introduced it has the potential to cause significant damage. Statutory action against findings is justified and regulation of the pest advised.

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/