| Scientific Name: | Allium giganteum |
| Common Name: | tall ornamental onion |
| Family Name: | Amaryllidaceae |
| Origin: | Central / west Asia |
| Hardiness Zone: | Zone 5: (-29 to -23 °C) |
| Plant Type: | Herbaceous perennial |
| Mature Size: | 0.7 - 1.3m x 0.3 - 0.6m (height x width) |
| Habit: | Upright |
| Form: | Pyramidal - narrowly |
| Texture: | Medium |
| Landscape Uses: | Cut flower or foliage, Perennial border, Spring interest |
| Exposure: | Full sun |
| Soil or Media: | Well-drained |
| Leaves: | Simple, Basal, Soft flexible, Glabrous, Distinctive smell, Linear, Entire |
| Flowers: | Umbel, Violet, Purple, May-Jun |
| Fruit: | Capsule, Brown, Jul-Aug |
| Key ID Features: | |
| Bulbs 5-8cm wide; leaves basal, strap-shaped, most 15-45cm long x 4-6(-10)cm wide, have onion odour when crushed and die back when flowering; umbels round 10-14cm wide, florets star-shaped, 1.5-2.5cm wide, peduncles 0.9-1.4m long. | |