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Allium caeruleum
Species of flowering plant From Wikipedia, the free encyclopedia
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Allium caeruleum (blue globe onion, blue ornamental onion, blue-of-the-heavens, blue-flowered garlic; syn. Allium azureum Ledeb.) is an ornamental bulbous plant of the onion genus, native to Central Asia (Kazakhstan, Kyrgyzstan, Siberia, Tajikistan, Uzbekistan, and Xinjiang).[3][4][5] In these regions, it is found on dry slopes, plains, and steppes.[6]
This plant is cited in the Flore des Serres et des Jardins de l'Europe puis L'illustration horticole by Charles Antoine Lemaire. It grows to 80 cm (31"), producing strap-shaped leaves and small globes (umbels) of blue flowers in early summer. The one-inch wide globular flower heads attract butterflies.[7] The plant has been granted the British Royal Horticultural Society's Award of Garden Merit (1993).[8]
A. caeruleum thrives in well-drained soil in full to partial sun.[9] It is deer-resistant and suitable for USDA hardiness zones 4–8.[6]
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Gallery
Allium caeruleum var. bulbilliferum Egyptian Top Onion at Minnesota Landscape Arboretum
Flower head closeup
References
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