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Allium sphaerocephalon (Roundhead leek)
2 hours care
per year
per year
0.9m
Max height
Max height
0.1m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Allium sphaerocephalon
Other names
Roundhead leek, Round-headed allium
Genus
Allium Allium
Species
A. sphaerocephalon - A. sphaerocephalon is a bulbous perennial with strap-like, mid-green basal leaves and tall stems bearing small round or oval pink to purple-red flowerheads in summer
Allium sphaerocephalon is: Deciduous
Habit
Erect, Spreading
Flower
Pink, Reddish-purple in Summer
Foliage
Mid-green in Spring; Mid-green in Summer
How to care
Watch out for
Downy mildew , Onion rot Downy mildew , Onion rot
General care
Propagation methods
Division, Seed
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Where to grow
Allium sphaerocephalon (Roundhead leek) will reach a height of 0.9m and a spread of 0.1m after 2-5 years.
Suggested uses
Architectural, Beds and borders, Cottage/Informal, Flower Arranging, Gravel, Underplanting
Cultivation
Grows in fertile, 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
North, 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 sphaerocephalon
Other names
Roundhead leek, Round-headed allium
Genus
Allium Allium
Species
A. sphaerocephalon - A. sphaerocephalon is a bulbous perennial with strap-like, mid-green basal leaves and tall stems bearing small round or oval pink to purple-red flowerheads in summer
Foliage
Deciduous
Habit
Erect, Spreading
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Colour
Flower
Pink, Reddish-purple in Summer
Foliage
Mid-green in Spring; Mid-green in Summer
How to care
Watch out for
Specific diseases
General care
Propagation methods
Division, Seed
Monthly care advice
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Where to grow
Allium sphaerocephalon (Roundhead leek) will reach a height of 0.9m and a spread of 0.1m after 2-5 years.
Suggested uses
Architectural, Beds and borders, Cottage/Informal, Flower Arranging, Gravel, Underplanting
Cultivation
Grows in fertile, 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
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
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Allium sphaerocephalon (Roundhead leek)
Allium sphaerocephalon (Roundhead leek)
Allium sphaerocephalon
Allium sphaerocephalon (Roundhead leek)
(22/11/2012)
| 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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