Also, are garlic tops (like the chives) edible as chives?
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No, on the leaf stems and flowers are edible, not the chive bulbs.
As far as garlic tops go, you are probably thinking of garlic scapes. The scape is like the stalk that grows out of the bulb and is a popular food chefs love. It’s not shaped like the garlic leaves. Instead, the scape curves. Here’s an article from Mother Earth News on Garlic Scapes.