Allium nigrum
ornamental onion
- Position: full sun
- Soil: fertile, well-drained soil
- Rate of growth: fast-growing
- Flowering period: May to June
- Flower colour: white
- Other features: grey-green leaves
- Hardiness: fully hardy
- Garden care: Avoid excessive mositure from late summer when they become dormant. Over-large clumps can be lifted and divided in autumn or spring.
The grey-green leaves of this ornamental onion generally have started to die back when the flowers emerge in early summer. These sit on tall, sturdy stems forming flattish clusters that create a striking silhouette. Each creamy-white to pale lavender flower has a pronounced ovary at its heart, which looks a little like a green pearl, nestled in the centre.
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