Euphorbia 'Blue Haze' (Spurge 'Blue Haze')

Botanical name

Euphorbia 'Blue Haze'

Other names

Spurge 'Blue Haze', Milkwort 'Blue Haze'

Genus

Euphorbia Euphorbia

Variety or Cultivar

'Blue Haze' _ 'Blue Haze' is a compact, mound-forming, evergreen perennial with upright stems bearing narrowly lance-shaped, blue-grey to blue-green leaves and, in spring, small clusters of tiny, yellow flowers surrounded by prominent, yellow-green bracts.

Foliage

Evergreen

Habit

Cushion or Mound Forming, Compact

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, Yellow in Spring

Foliage

Blue-green in All seasons

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How to care

Watch out for

Specific pests

Deer

Specific diseases

Rust

General care

Pruning

Cut back hard after flowering.

Propagation

Tends to self-seed freely and true to type. Divide in autumn or spring.

Propagation methods

Division, Basal cuttings, Seed

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Monthly care advice

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Where to grow

Euphorbia 'Blue Haze' (Spurge 'Blue Haze') will reach a height of 0.45m and a spread of 0.9m after 2-5 years.

Suggested uses

Underplanting, Low Maintenance, Ground Cover, Flower Arranging, City, Beds and borders

Cultivation

Grow in well-drained or moist but well-drained soil in sun. Best with afternoon shade in hot summer climates. Does not tolerate wet, waterlogged soil, especially in winter. Dislike hot, humid summers.

Soil type

Clay, Loamy, Sandy

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

Defra's Risk register #1

Plant name

Euphorbia 'Blue Haze' (Spurge 'Blue Haze')

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 'Blue Haze' (Spurge 'Blue Haze')

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 'Blue Haze' (Spurge 'Blue Haze')

Common pest name

pink wax scale; red was scale; ruby wax scale

Scientific pest name

Ceroplastes rubens

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

Based on its biology and low potential impact continued action on this pest in the UK would not be considered appropriate. It is likely to be of more concern to southern Member States of the EU; as it is an economic pest of citrus.

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/