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What does a flowering head of garlic look like? It is a lot like the flowering head of an onion when in full bloom, but if left unaltered it has one enormous difference: Bulbils. Pic related is one of my garlic plants with its sheath just starting to break open. (This is descended from a softneck garlic that I had purchased at the grocery store and planted, which miraculously decided to bolt, or scape.) You'll notice that it is quite a bit more solid than an onion head.