Allium giganteum

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42.1447525, -87.78798676

42.1447525, -87.78794098

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42.14518356, -87.78746796

42.14522171, -87.78735352

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42.14535522, -87.78725433

42.14546585, -87.78751373

42.14649963, -87.789711

42.14776993, -87.79210663

42.14963913, -87.78983307

Giant Onion

Giant onion (Allium giganteum) forms a clump of 2-foot-long, strappy, gray-green leaves. In midspring, the foliage starts to wither, and 4-foot flowering stems rise up with large, 6-inch globes of purple (rarely white) flowers. It prefers well-drained soil in full sun in a site protected from the wind. Key to naturalizing the giant onion in the garden is allowing the soil to dry from midsummer to fall and applying an annual layer of mulch before the seeds are dispersed, not afterward.

Soil:
Moderate
Plant Shape:
Upright
Exposure:
Full Sun
Bloom Time:
May - June
Bloom Color:
Lavender
Purple
Landscape Use:
Bedding or Border
Specimen Plant
Wildlife Interest:
Attracts Butterflies
Resistant To Deer
Plant Type:
Bulb
Hardiness Zone:
4 - 8