About
Allium 'World Cup' is a bulbous perennial characterized by its broad, strap-shaped, mid-green basal foliage. In early summer, it produces clusters of compact, star-like flowers in a pink-violet hue, reaching a height of up to 110 cm. As the plant matures, it develops side bulbs that lead to larger clumps, each showcasing multiple vibrant flower heads.
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
- East-facing, South-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H5
Plant details
- Plant type
- Bulbs
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 1-1.5 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Cottage and informal garden
Care notes
- Cultivation
- Grow in well-drained soil in full sun; for more advice see allium cultivation
- Pruning
- No pruning required
- Propagation
- Remove offsets in autumn
- Pest resistance
- May be susceptible to damage by slugs and snails
- Disease resistance
- May be susceptible to onion white rot and downy mildews