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Allium caeruleum (blue globe onion, blue ornamental onion, blue-of-the-heavens, blue-flowered garlic) is an ornamental bulbous plant of the onion genus, native to Central Asia. It grows to 80 cm, producing strap-shaped leaves and small globes (umbels) of blue flowers in early Summer. The plant has been granted the British Royal Horticultural Society's Award of Garden Merit