Allium - Giganteum
$11.99
The tallest of all ornamental onion species, the giant allium produces 6- to 8-inch purple blooms made up of many star-shaped flowers. These captivating flowers are supported by 4- to 5-foot tall stalks that appear from a basal rosette of leaves, measuring about 18 inches across. The foliage dies back before the flowers bloom, leaving only the iconic stalk and puffball blooms to stand out in the garden.
| Botanical Name | Allium giganteum |
| Common Name | Giant allium, giant ornamental onion |
| Plant Type | Perennial |
| Mature Size | 4-5 ft. tall, 2 ft. wide |
| Sun Exposure | Full, partial |
| Soil Type | Loamy, sandy, well-drained |
| Soil pH | Acidic, neutral, alkaline |
| Bloom Time | Spring, summer |
| Flower Color | Purple |
| Hardiness Zones | 4-9, USA |
| Native Area | Asia |
| Toxicity | Toxic to dogs and cats |