Allium schubertii
Allium schubertii
One of the most extraordinary alliums, producing enormous spiky flower heads up to 30cm across with florets on stalks of different lengths, creating a firework explosion effect. Pale lilac flowers appear in late spring. The dried seed heads are spectacular and last for months. Needs warm, dry conditions in UK gardens.
Where to plant
Best aspect
Border position
When to plant and expect flowers
Plant
Flowers
How to grow allium schubertii
Plant 10cm deep in a warm, sheltered spot with sharp drainage. Add grit to planting holes on heavier soils. Not fully reliable in cold wet winters so mulch well or grow in containers. The extraordinary seed heads are worth the extra effort.
Soil requirements
Soil type
sand, loam
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
Related guides
The 70-30 Rule for Better Garden Borders
The 70-30 planting rule explained: 70% structure and foliage, 30% seasonal flowers, measured by area, so your UK border looks full in every month.
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How to spot allium leaf miner, when to cover leeks, onions and garlic with fine mesh, and the simple tidy-up that stops it coming back.
Allium White Rot: The 20-Year Soil Problem
How to spot allium white rot on onions, garlic and leeks, how it spreads, and the easy ways to keep growing them if your soil has it.