About
Allium 'Mont Blanc' is a robust perennial that reaches a height of approximately 1 meter. Its wide, grey-green leaves are strap-like and will wither as the flowering period begins. In late spring to early summer, the plant produces dense, spherical clusters of star-shaped flowers that are predominantly white with a subtle green tint.
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, West-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
- 2-5 years
- Suggested uses
- Architectural, City and courtyard gardens, Cottage and informal garden, Gravel garden, Wildlife gardens
- Fragrance
- Foliage
Care notes
- Cultivation
- Grow in fertile, well-drained soil. Add grit to clay soils to improve drainage. See allium cultivation
- Pruning
- No pruning required
- Propagation
- Propagate by removing offsets in autumn
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free but may be susceptible to onion white rot and downy mildews