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Aster amellus 'King George' (Italian aster 'King George')

Beginner
skill rating
2 hours care
per year
0.45m
Max height
0.45m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Aster amellus 'King George'

Other names

Italian aster 'King George'

Genus

Aster Aster

Variety or Cultivar

'King George' _ 'King George' forms a clump of dark green lance-shaped leaves and beautiful, large, violet-purple flowers from summer into autumn.


Aster amellus 'King George' is: Deciduous

Habit

Bushy, Compact, Cushion or Mound Forming, Rounded

Awards

RHS AGM (Award of Garden Merit)

Flower

Violet, Purple in Summer; Purple, Violet in Autumn

Foliage

Dark-green in Summer; Dark-green in Autumn

How to care

Watch out for

Specific pests

Aphids , Leaf and bud eelworms , Slugs , Snails Aphids , Leaf and bud eelworms , Slugs , Snails

Diseases

Mildew resistant

Fusarium wilt , Grey mould , Leaf spot Fusarium wilt , Grey mould , Leaf spot

General care

Pruning

Cut back after flowering.

Propagation methods

Basal cuttings, Division


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Where to grow

Aster amellus 'King George' (Italian aster 'King George') will reach a height of 0.45m and a spread of 0.45m after 2-5 years.

Suggested uses

Cottage/Informal, Flower Arranging, Beds and borders, Wildlife

Cultivation

Plant in well-drained, moderately fertile soil in an open and sunny position. Thrives best in alkaline soil.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Alkaline, Neutral

Light

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)

Companion plants

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

Botanical name

Aster amellus 'King George'

Other names

Italian aster 'King George'

Genus

Aster Aster

Variety or Cultivar

'King George' _ 'King George' forms a clump of dark green lance-shaped leaves and beautiful, large, violet-purple flowers from summer into autumn.

Foliage

Deciduous

Habit

Bushy, Compact, Cushion or Mound Forming, Rounded

Awards

RHS AGM (Award of Garden Merit)


Colour

Flower

Violet, Purple in Summer; Purple, Violet in Autumn

Foliage

Dark-green in Summer; Dark-green in Autumn


How to care

Watch out for

Specific pests

Aphids , Leaf and bud eelworms , Slugs , Snails

Diseases

Mildew resistant

Specific diseases

Fusarium wilt , Grey mould , Leaf spot

General care

Pruning

Cut back after flowering.

Propagation methods

Basal cuttings, Division


Monthly care advice


Where to grow

Aster amellus 'King George' (Italian aster 'King George') will reach a height of 0.45m and a spread of 0.45m after 2-5 years.

Suggested uses

Cottage/Informal, Flower Arranging, Beds and borders, Wildlife

Cultivation

Plant in well-drained, moderately fertile soil in an open and sunny position. Thrives best in alkaline soil.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Alkaline, Neutral

Light

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 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Aster amellus 'King George' (Italian aster 'King George')

Common pest name

Asterleafhopper

Scientific pest name

Macrosteles quadrilineatus

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)

4

General biosecurity comments

Leafhopper pest native to North America; where it is responsible for purple top wilt disease of potatoes and aster yellows in lettuce. Not known to be present in the UK or elsewhere in the EU and statutory action will be taken in response to confirmed findings.

Defra's Risk register #2

Plant name

Aster amellus 'King George' (Italian aster 'King George')

Common pest name

Corn borer; Corn moth; European corn borer; European maize borer; European stalk borer; Maize pyralid

Scientific pest name

Ostrinia nubilalis

Type

Insect

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

Polyphagous boring pest present in the UK since the 1930’s. A maize-affecting race was detected for the first time in 2010. Industry may wish to monitor for its presence and mitigate against impacts.

Defra's Risk register #3

Plant name

Aster amellus 'King George' (Italian aster 'King George')

Common pest name

Green semi-looper

Scientific pest name

Chrysodeixis eriosoma

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

Polyphagous moth pest which is morphologically identical to a pest already established in the UK in protected environments and being controlled by IPM. Not expected to cause greater impacts than other species of Chrysodeixis in the UK.

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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Soil types: Chalky, Loamy, Sandy Tell us...
Soil drainage: Well-drained Tell us...
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Light: Full Sun Tell us...
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Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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