Euphorbia seguieriana subsp. niciciana (Siberian spurge)

Botanical name

Euphorbia seguieriana subsp. niciciana

Other names

Euphorbia reflexa, Siberian spurge

Genus

Euphorbia Euphorbia

Species

E. seguieriana subsp. niciciana - E. seguieriana subsp. niciciana is a clump-forming, woody-based, semi-evergreen perennial with whorls of narrow, glaucous, blue-green leaves on branched stems and yellow-green flowers in late summer and early autumn.

Foliage

Semi evergreen

Habit

Clump-forming

Toxicity

All parts of the plant are highly toxic if ingested. The milky sap may cause irritation to skin and eyes.

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Colour

Flower

Yellow-green in Summer; Yellow-green in Autumn

Foliage

Blue-green in All seasons

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How to care

Watch out for

Specific pests

Aphids

Specific diseases

Grey mould

General care

Pruning

Cut back flowering shoots to ground level in late summer or autumn.

Propagation methods

Basal cuttings, Division

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Monthly care advice

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Where to grow

Euphorbia seguieriana subsp. niciciana (Siberian spurge) will reach a height of 0.5m and a spread of 0.45m after 2-5 years.

Suggested uses

Beds and borders, Containers, Cottage/Informal, Mediterranean

Cultivation

Plant in well-drained, light soil in full sun.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

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 11, Zone 10, Zone 9, Zone 8, Zone 7, Zone 6

Defra's Risk register #1

Plant name

Euphorbia seguieriana subsp. niciciana (Siberian spurge)

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

Euphorbia seguieriana subsp. niciciana (Siberian spurge)

Common pest name

cotton mealybug

Scientific pest name

Phenacoccus solenopsis

Type

Insect

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)

3

General biosecurity comments

Watching brief for potential impact on tomato production in the Mediterranean. Other southern European countries likely to be more at risk. Precautionary action will be taken on findings on planting material to protect glasshouse crops and botanical gardens.

Defra's Risk register #3

Plant name

Euphorbia seguieriana subsp. niciciana (Siberian spurge)

Common pest name

Powdery mildew: cotton; Powdery mildew: eggplant; Powdery mildew: pepper; Powdery mildew: tomato

Scientific pest name

Leveillula taurica

Type

Fungus

Current status in UK

Present (Limited)

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

Believed to be present and no statutory action is being taken. Status needs to be confirmed by survey.

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/