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Allium 'Globemaster' (Allium 'Globemaster')

Beginner
skill rating
2 hours care
per year
1.5m
Max height
0.5m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Allium 'Globemaster'

Other names

Allium 'Globemaster'

Genus

Allium Allium

Variety or Cultivar

'Globemaster' _ 'Globemaster' has strap-shaped, grey-green leaves and globular clusters of starry violet-purple flowers.


Allium 'Globemaster' is: Deciduous

Fragrance

Foliage has a nice fragrance

Habit

Erect

Awards

RHS AGM (Award of Garden Merit)

Flower

Dark-purple in Summer

Foliage

Grey-green in Summer

How to care

Watch out for

Pests

Pest free, may suffer from slugs on new growth.

Onion rot , Downy mildew Onion rot , Downy mildew

General care

Pruning

No pruning required.

Propagation methods

Division, Seed


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Where to grow

Allium 'Globemaster' (Allium 'Globemaster') will reach a height of 1.5m and a spread of 0.5m after 2-5 years.

Suggested uses

Architectural, Cottage/Informal, Flower Arranging, Beds and borders, Gravel

Cultivation

Grow in fertile, but well-drained soil. Add grit to clay soils to improve drainage.

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

Full Sun

Aspect

South, East, West

Exposure

Sheltered

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

Hardy (H4)

Companion plants

Botanical name

Allium 'Globemaster'

Other names

Allium 'Globemaster'

Genus

Allium Allium

Variety or Cultivar

'Globemaster' _ 'Globemaster' has strap-shaped, grey-green leaves and globular clusters of starry violet-purple flowers.

Foliage

Deciduous

Fragrance

Foliage has a nice fragrance

Habit

Erect

Awards

RHS AGM (Award of Garden Merit)


Colour

Flower

Dark-purple in Summer

Foliage

Grey-green in Summer


How to care

Watch out for

Pests

Pest free, may suffer from slugs on new growth.

Specific diseases

Onion rot , Downy mildew

General care

Pruning

No pruning required.

Propagation methods

Division, Seed


Monthly care advice


Where to grow

Allium 'Globemaster' (Allium 'Globemaster') will reach a height of 1.5m and a spread of 0.5m after 2-5 years.

Suggested uses

Architectural, Cottage/Informal, Flower Arranging, Beds and borders, Gravel

Cultivation

Grow in fertile, but well-drained soil. Add grit to clay soils to improve drainage.

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

Full Sun

Aspect

South, East, West

Exposure

Sheltered

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

Hardy (H4)

Defra's Risk register #1

Plant name

Allium 'Globemaster' (Allium 'Globemaster')

Common pest name

allium leaf miner

Scientific pest name

Phytomyza gymnostoma

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

Pest of Allium already present in UK and spreading; previous consultation supported awareness raising only; industry should prepare for the event of findings in commercial crops.

Defra's Risk register #2

Plant name

Allium 'Globemaster' (Allium 'Globemaster')

Common pest name

Asain cotton leafworm; Cluster caterpillar; Fall armyworm; Rice cutworm; Taro caterpiller; Tobacco budworm; Tobacco caterpillar; Tobacco cutworm; Tobacco leaf caterpillar

Scientific pest name

Spodoptera litura

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

Regulated pest; frequently intercepted with occasional outbreaks which have been successfully eradicated in the UK.

Defra's Risk register #3

Plant name

Allium 'Globemaster' (Allium 'Globemaster')

Common pest name

African cottom leafworm; Cotton leafworm; Egyptian cotton leafworm; Egyptian cotton worm; Mediterranean climbing cutworm; Meditteranea Brocade; Tobacco cutworm

Scientific pest name

Spodoptera littoralis

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)

3

General biosecurity comments

Regulated pest; frequently intercepted with occasional outbreaks which have been successfully eradicated 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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Going to seed (05/07/2013)

Allium 'Globemaster'

Once they are established they begin to multiply. (16/01/2012)

Allium globemaster

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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: Full Sun Tell us...
Aspect: South, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

DISCUSS THIS PLANT

Allium Globemaster plant in a container..?

Hi,I'd like to plant some Allium Globemaster in a container for my patio next year. I've read that the foilage can look unattractive. Can someone recommend what plants I could plant with the Allium… read more

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