Allium giganteum
Allium giganteum, commonly known as Giant Onion, is a perennial ornamental plant belonging to the Amaryllidaceae family. It thrives in full sun with medium water requirements and is suitable for USDA zones 5–8. This plant typically grows to a height of 0.9–1.5 meters and produces striking purple flowers in late spring to early summer. It prefers loamy, chalky, or sandy soil and is known to attract pollinators.
Light
Full sun
Watering
Medium water
Soil
Loamy, Chalky, Sandy
Height
0.9–1.5 m
Spread
0.3–0.6 m
Zones
5–8
Flower colors