About
Allium 'Universe' is a bulbous perennial that reaches a height of 70 cm. It produces large, round flowerheads that are loosely arranged and display a violet-purple hue, measuring up to 18 cm in diameter during the summer months.
About the genus
Allium consists of bulbous herbaceous perennials characterized by a pronounced onion or garlic aroma. They feature linear, strap-like, or cylindrical leaves that arise from the base. The flowers, which can be star-shaped or bell-shaped, are arranged in an umbel atop a stem that lacks leaves.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- South-facing, North-facing, West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H5
Plant details
- Plant type
- Bulbs
- Habit
- Columnar upright
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 1-2 years
- Suggested uses
- City and courtyard gardens, Cottage and informal garden, Wildlife gardens
- Fragrance
- Foliage
- Toxicity
- Bulbs may irritate skin or aggravate skin allergies. Wear gloves and other protective equipment when handling
Care notes
- Cultivation
- Easy to grow in fertile well-drained soil in sun.
- Pruning
- No pruning required
- Propagation
- Propagate by offsets
- Pest resistance
- Generally pest-free
- Disease resistance
- May be susceptible to onion white rot and downy mildews