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Euphorbia 'Excalibur' (Spurge 'Excalibur')

Beginner
skill rating
1 hour care
per year
1m
Max height
0.5m
Max spread
2-5 years
To maturity
Low
Toxicity

Plant details

Botanical name

Euphorbia 'Excalibur'

Other names

Spurge 'Excalibur', Euphorbia 'Froeup'

Genus

Euphorbia Euphorbia

Variety or Cultivar

'Excalibur' _ 'Excalibur' is an upright, deciduous perennial with purple-red leaves in spring turning grey-green with age and bright yellow flower-heads in summer.


Euphorbia 'Excalibur' is: Evergreen

Habit

Upright

Toxicity

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

Awards

RHS AGM (Award of Garden Merit)

Flower

Bright-yellow in Summer

Foliage

Reddish-purple in Spring; Grey-green in Summer; Grey-green in Autumn

How to care

Watch out for

Pests

Generally pest free.

Diseases

Generally disease free.

General care

Pruning

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

Propagation methods

Division


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Where to grow

Euphorbia 'Excalibur' (Spurge 'Excalibur') will reach a height of 1m and a spread of 0.5m after 2-5 years.

Suggested uses

Beds and borders, City, Cottage/Informal, Flower Arranging, Gravel, Low Maintenance, Underplanting

Cultivation

Grow in moist soil in partial or dappled shade.

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

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Euphorbia 'Excalibur'

Other names

Spurge 'Excalibur', Euphorbia 'Froeup'

Genus

Euphorbia Euphorbia

Variety or Cultivar

'Excalibur' _ 'Excalibur' is an upright, deciduous perennial with purple-red leaves in spring turning grey-green with age and bright yellow flower-heads in summer.

Foliage

Evergreen

Habit

Upright

Toxicity

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

Awards

RHS AGM (Award of Garden Merit)


Colour

Flower

Bright-yellow in Summer

Foliage

Reddish-purple in Spring; Grey-green in Summer; Grey-green in Autumn


How to care

Watch out for

Pests

Generally pest free.

Diseases

Generally disease free.

General care

Pruning

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

Propagation methods

Division


Monthly care advice


Where to grow

Euphorbia 'Excalibur' (Spurge 'Excalibur') will reach a height of 1m and a spread of 0.5m after 2-5 years.

Suggested uses

Beds and borders, City, Cottage/Informal, Flower Arranging, Gravel, Low Maintenance, Underplanting

Cultivation

Grow in moist soil in partial or dappled shade.

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

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 9, Zone 8, Zone 7, Zone 6

Defra's Risk register #1

Plant name

Euphorbia 'Excalibur' (Spurge 'Excalibur')

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 'Excalibur' (Spurge 'Excalibur')

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.

Defra's Risk register #3

Plant name

Euphorbia 'Excalibur' (Spurge 'Excalibur')

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: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/

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This plant likes... Garden match
Soil types: Chalky, Clay, Loamy, Sandy (will tolerate most soil types) Tell us...
Soil drainage: Moist but well-drained, Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

ARTICLES WITH THIS PLANT

The M&G Garden by Andy Sturgeon - Best in Show 2019

M&G Investments, the title sponsor of the RHS Chelsea Flower Show, commissioned designer Andy Sturgeon (Best in Show winner 2010 and 2016) to create this incredible garden. read more


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