Round-Headed Leek | Allium sphaerocephalon
Dreamy drumstick blooms
Grown by Mike's perennial specialists
UK
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Round-Headed Leek
Allium sphaerocephalon
- Standing out from the crowd, Allium sphaerocephalon produces charming drumstick flowers that weave through a border. This ornamental adds architectural whimsy and levity to any planting scheme.
- It offers a captivating colour transformation, with tight green buds slowly flushing to a rich mauve. Blooming in July and August, it perfectly bridges the early and late summer seasons.
- It's an exceptional choice for a hot, gravel garden, thriving in full sun and well-drained soils. This drought-tolerant bulb looks fab when set in prairie-style plantings or planted amongst ornamental grasses.
- With a slender, upright habit, it reaches up to 90cm tall while taking up little bed space. This makes it perfect for squeezing into established borders to create floating dots of colour.
- A fantastic all-rounder, this allium boasts an RHS Award of Garden Merit and Plants for Pollinators status, drawing in countless bees and butterflies.
What to expect
Supplied as
Eventual height
Eventual spread
Flower colour
Habit
Hardiness
Spacing
Will this grow in my garden?
Can I grow this in a pot?
Yes, Round-Headed Leek grows well in pots with regular watering during dry spells.
How big does it get?
Round-Headed Leek typically reaches a mature height of 60 cm and a spread of 15 cm.
How much sunlight does this need?
Round-Headed Leek requires full sun for at least 6 hours a day.
What kind of soil does this plant prefer?
Round-Headed Leek prefers well-drained, moderately fertile soil.
How much watering does this plant need?
Round-Headed Leek needs about 2.5 centimetres of water per week, keeping the soil evenly moist.
Will this plant need pruning?
Round-Headed Leek | Allium sphaerocephalon does not need pruning. You can leave the attractive seedheads standing through winter and remove them once they collapse.
How hardy is this plant?
Round-Headed Leek is fully hardy (H6), tolerating temperatures down to -15°C to -20°C. It is robust and grows reliably in all regions of the UK.
The wider garden
UK
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