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Allium scorodoprasum (Sand leek)

Beginner
skill rating
2 hours care
per year
0.25m
Max height
0.15m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Allium scorodoprasum

Other names

Sand leek, Rocambole

Genus

Allium Allium

Species

A. scorodoprasum - A. scorodoprasum is an upright, bulbous perennial with broadly linear, slightly keeled, mid-green leaves, rough on the edge, and erect stems bearing spherical umbels of stalked, reddish-purple flowers from late spring to late summer.


Allium scorodoprasum is: Deciduous

Habit

Compact, Clump-forming

Flower

Reddish-purple in Spring; Reddish-purple in Summer

Foliage

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

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

If practical, remove bulbils to prevent unwanted plants. If desired, remove leaves only after they have completely died down.

Propagation

Seldom produces viable seed. Remove offsets in autumn. Propagate by bulbils.

Propagation methods

Division, Seed


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Where to grow

Allium scorodoprasum (Sand leek) will reach a height of 0.25m and a spread of 0.15m after 2-5 years.

Suggested uses

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

Cultivation

Grow in fertile, well-drained soil in full sun. Plant bulbs 5-10cm deep in autumn. Add grit to clay soils to improve drainage. Site carefully as tends to spread rapidly by bulbils.

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

North, South, East, West

Exposure

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

Allium scorodoprasum

Other names

Sand leek, Rocambole

Genus

Allium Allium

Species

A. scorodoprasum - A. scorodoprasum is an upright, bulbous perennial with broadly linear, slightly keeled, mid-green leaves, rough on the edge, and erect stems bearing spherical umbels of stalked, reddish-purple flowers from late spring to late summer.

Native to

Caucasus, Europe, Korea, Turkey

Foliage

Deciduous

Habit

Compact, Clump-forming


Colour

Flower

Reddish-purple in Spring; Reddish-purple in Summer

Foliage

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


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

If practical, remove bulbils to prevent unwanted plants. If desired, remove leaves only after they have completely died down.

Propagation

Seldom produces viable seed. Remove offsets in autumn. Propagate by bulbils.

Propagation methods

Division, Seed


Monthly care advice


Where to grow

Allium scorodoprasum (Sand leek) will reach a height of 0.25m and a spread of 0.15m after 2-5 years.

Suggested uses

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

Cultivation

Grow in fertile, well-drained soil in full sun. Plant bulbs 5-10cm deep in autumn. Add grit to clay soils to improve drainage. Site carefully as tends to spread rapidly by bulbils.

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

North, South, East, West

Exposure

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

Allium scorodoprasum (Sand leek)

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 scorodoprasum (Sand leek)

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 scorodoprasum (Sand leek)

Common pest name

Sugarbeet webworm; Weevil; Australian tomato; Weevil; vegetable

Scientific pest name

Listroderes costirostris

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

Awareness needs to be maintained due to the risk of entry as a 'hitchhiker' and monitoring of the pest in countries where it is known to be present.

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

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