About
Allium atropurpureum is a resilient perennial bulb that can reach heights of up to 60 cm. It features elongated, strap-like green foliage. In late spring and early summer, it produces deep purple-red flowers arranged in a hemisphere shape, measuring up to 5 cm in diameter, atop sturdy, upright stems.
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, East-facing
- Exposure
- Sheltered
- UK hardiness
- H5
Plant details
- Plant type
- Bulbs
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.5-1 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- Architectural, Cottage and informal garden, Gravel garden, City and courtyard gardens, Wildlife gardens
- Native to
- Hungary to Turkey
- Fragrance
- Foliage
Care notes
- Cultivation
- Easy to grow in fertile well-drained soil. Add grit when grown in clay soils to improve drainage. See allium cultivation
- Pruning
- No pruning required
- Propagation
- Propagate by seed, sowing in containers in a cold frame when just ripe or in the spring. Alternatively, remove offsets in autumn
- Pest resistance
- Generally pest-free
- Disease resistance
- May be susceptible to onion white rot and downy mildews