Allium giganteum

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Giant onion
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Amaryllidaceae
Subfamily: Allioideae
Genus: Allium
A. giganteum
Binomial name
Allium giganteum

Allium procerum Trautv. ex Regel

Allium giganteum, common name giant onion, is an Asian species of onion, native to central and southwestern Asia but cultivated in many countries as a flowering garden plant.[4][5] It is the tallest species of Allium in common cultivation, growing to 1.5 metres (4.9 ft).[6]

In early to midsummer, small globes of intense purple umbels appear, followed by attractive fruiting umbels. A popular cultivar, 'Globemaster', is shorter (80 centimetres (31 in)) but produces much larger, deep violet, umbels (15–20 centimetres (5.9–7.9 in)). Both varieties have been granted the Royal Horticultural Society's Award of Garden Merit.[7][8][9]

In nature, the species is found in Iran, Afghanistan, Turkey, Turkmenistan, Tajikistan, and Uzbekistan.[3] In cultivation in the US, it performs well in USDA hardiness zones 6–10.[10]

Eating flowers, seeds, leaves, and stems can cause nausea, vomiting, and diarrhea due to the sulfides they contain.[11]


  1. ^ Eduard August von Regel. 1883. Gartenflora 32: 91.
  2. ^ The Plant List
  3. ^ a b Kew World Checklist of Selected Plant Families
  4. ^ Regel, Eduard August von 1883. Gartenflora (1883) 32: 91
  5. ^ Tropicos, Allium giganteum Regel
  6. ^ Missouri Botanical Garden: Allium giganteum
  7. ^ Allium giganteum Royal Horticultural Society
  8. ^ Allium 'Globemaster' Royal Horticultural Society
  9. ^ "Allium giganteum". Plants for a Future.
  10. ^ "Allium giganteum (Ornamental Onion)". Retrieved 2021-07-09.
  11. ^ "Allium giganteum (Giant Ornamental Onion, Ornamental Onion) | North Carolina Extension Gardener Plant Toolbox". Retrieved 2021-07-09.