Giant Onion (Allium giganteum) is a striking perennial known for its towering flower stalks topped with large, spherical purple blooms in late spring. It thrives in full
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Sunlight
Requires full sun for optimal flowering.
Watering
Moderate during growth, dry during dormancy.
Soil
Well-drained, fertile loam
Temperature
Hardy in temperate zones, prefers cool springs for growth.
Habitat
Outdoor
Fertilizer
Fertilize once in early spring as new growth emerges.
Requires full sun for optimal flowering.
Moderate during growth, dry during dormancy.
Spring (active growth)
Well-drained, fertile loam
Hardy in temperate zones, prefers cool springs for growth.
Growing season
Outdoor
Fertilize once in early spring as new growth emerges.
Early Spring
Plant Type
Herb
Plant Category
Ornamental, Flowering
Plant Place Type
Ground, Garden, Pot
Plant Environment
Outdoor
Lifespan
Perennials
Plant Height
1-1.5 m
Spread
0.3-0.5 m
Growth Rate
Moderate
Dormancy
Summer
Leaf Color
Green, Grayish-green
Leaf Type
Linear
Flower Size
15-20 cm
Optimal Sunlight Lux
80000
Toxic for humans
No
Rating: 0/5
Toxic for pets
Yes
Rating: 7/5
Edible
Yes
Contains sulfur compounds that can cause gastrointestinal upset and red blood cell damage in pets if ingested.
