Allium cristophii
Allium cristophii
Star of Persia produces enormous metallic-purple flower heads up to 25cm across in early summer. Each head contains 50-80 individual star-shaped florets that shimmer in sunlight. The dried seed heads persist for months. One of the most dramatic alliums for front-of-border planting in UK gardens.
Where to plant
Best aspect
Border position
When to plant and expect flowers
Plant
Flowers
How to grow allium cristophii
Plant 10cm deep in autumn. Thrives in poor, dry soil and full sun. The enormous seed heads dry beautifully on the plant. Allow foliage to die back naturally. Excellent combined with low grasses that disguise dying leaves.
Soil requirements
Soil type
loam, sand, chalk
Moisture
well drained
pH
neutral, alkaline
Aftercare
Allow foliage to die back naturally after flowering. Remove spent flower heads to prevent self-seeding.
Propagation
- Offsets in autumn
- Seed
Wildlife value
Toxicity
All parts mildly toxic. Contains organosulfur compounds causing gastrointestinal upset.
Common problems
- Slugs and snails
- Squirrels digging up bulbs
Similar bulbs to grow
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