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Gerald L. Klingaman
Liliaceae
Allium giganteum
Giant Flowering Onion, Giant Ornamental Onion
During the summer, the giant flowering onion reaches the height of many adults. Atop this long stem sits a lavender-pink globe the size of an orange. Each globe contains fifty or more star-shaped flowers with prominent stamens. Long, strappy leaves whither before this giant emerges. The giant onion is native to central Asia, where it grows in well-drained, often sandy soil in full sun.
Plant this bulb in the autumn six inches deep (15 cm)in well-drained neutral soil. Onions are drought tolerant once they are established. Decrease the watering when the foliage starts to fade; lift and divide the clumps when they become crowded. Grow the giant onion wherever you want to attract attention. Try it in the vegetable garden, perhaps amid the foliage of squash or pumpkin, which will visually anchor the tall bare stem.
9 - 5
6 - 10
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Bulb or Corm or Tuber
Full Sun
5'-6' / 1.5m - 1.8m
4"-6" / 10.2cm - 15.2cm
Summer
Central Asia
Neutral
Well Drained
Loam, Sand
Drought
Medium
Drought Tolerant, Average Water
Showy
Light Pink, Lavender
Light Green
No
Yes
Single
Matte
Cutflower, Dried Flower/Everlasting, Feature Plant, Mixed Border, Rock Garden / Wall
Hummingbirds, Butterflies
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