Cornus alba 'Sibirica' (Siberian dogwood)

Botanical name

Cornus alba 'Sibirica'

Other names

Siberian dogwood, Cornus alba 'Westonbirt', Cornus 'Sibirica'

Genus

Cornus Cornus

Variety or Cultivar

'Sibirica' _ 'Sibirica' is a medium deciduous shrub producing a dense thicket of slender red stems, turning an even brighter crimson during the winter. It also forms ovate leaves which turn dark red in autumn; small, flat, cream flowerheads; and bluish-white berries.

Native to

Garden origin

Foliage

Deciduous

Habit

Branching, Suckering

Awards

RHS AGM (Award of Garden Merit)

Colour

Flower

White in Spring; White in Summer

Foliage

Green in Summer; Red in Autumn

How to care

Watch out for

Specific pests

Aphids , Glasshouse red spider mite , Mussel scale

General care

Propagation methods

Hardwood cuttings

Monthly care advice

Where to grow

Cornus alba 'Sibirica' (Siberian dogwood) will reach a height of 2.5m and a spread of 2.5m after 5-10 years.

Suggested uses

Low Maintenance

Cultivation

Plant in most soils in sun or partial shade.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, 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 7, Zone 6, Zone 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Cornus alba 'Sibirica' (Siberian dogwood)

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa subsp. multiplex

Type

Bacterium

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

A bacterial disease with a wide host range detected in Corsica. Although EU regulated; there remains some concern about the risk of introduction. This subspecies is known to be able to thrive in cooler climates. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

Defra's Risk register #2

Plant name

Cornus alba 'Sibirica' (Siberian dogwood)

Common pest name

Black timber bark beetle; Smaller alnus bark beetle; tea root borer

Scientific pest name

Xylosandrus germanus

Type

Insect

Current status in UK

Present (Limited)

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

4

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

3

General biosecurity comments

Ambrosia beetle affecting a wide range of trees and woody hosts. Widespread in Europe and elsewhere and now present in the south of England. Impacts can be reduced by good silvicultural practices. Surveillance is being carried out to better determine distribution.

Defra's Risk register #3

Plant name

Cornus alba 'Sibirica' (Siberian dogwood)

Common pest name

; Apple bark beetle; Asian ambrosia beetle; Granulate ambrosia beetle

Scientific pest name

Xylosandrus crassiusculus

Type

Insect

Current status in UK

Absent

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

4

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

3

General biosecurity comments

Ambrosia beetle which can affect a wide range of broadleaved trees; widespread in Africa; Asia and parts of the US; with outbreaks in France and Italy. The UK climate is unlikely to be suitable for the pest to thrive and cause significant damage but needs to be investigated through research. A Europe-wide PRA will help inform the case for EU regulation. Premises involved in importing wood and host plants from Italy in particular; where official measures are not being taken; should source material carefully.

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/