Giant Onion (Allium Giganteum) is a perennial bulb in the Amaryllidaceae family with easy care difficulty. It requires moderate watering and full sun light in USDA hardiness zones 4-8. This plant is toxic to cats and dogs — keep it out of reach of pets.
Allium giganteum is a striking ornamental bulbous perennial known for its large spherical clusters of purple flowers atop tall, leafless stems.
Giant Onion
Allium Giganteum
Allium giganteum is a striking ornamental bulbous perennial known for its large spherical clusters of purple flowers atop tall, leafless stems.
Quick Facts
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Growing Conditions
Care Calendar
Monthly care tasks for Giant Onion
Expert Care Tips
Pro tips from botanists and plant experts
Watering Tip
Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.
Humidity Trick
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Growth Hack
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