Some do, some don't?

Some will, some won't.
They were sold/bought as suitable to overwinter.  I've not held a census, but guesstimate ≈ 50% survival rate.  I filled in the gaps with Garlic.

There's also a rogue/weed/volunteer Garlic there (I suspect Elephant Garlic) and a "Society Garlic" over to the right which, though S.African, doesn't seem to succumbed to that last cold snap. 

I checked up to see about culinary use.

"Society garlic is scientifically known as Tulbaghia violacea, but unlike traditional garlic, where the bulbs are used in culinary and medicinal applications, the leaves of society garlic are used instead.   It is named so because of the belief that your breath won’t have the unpleasant smell when you eat this variety. 


While this garlic belongs to the same family as normal garlic, it is a different genus and has quite a different appearance.  The plant has violet or purple flowers and is also known as wild garlic, and it clumps together in a similar way to garlic. 
There are more than 20 different species of society garlic, all of which are found in South Africa. This perennial plant has been naturalized in other parts of the world, but it isn’t commonly found in many countries; in fact, many people don’t even know that this slightly less pungent variety of garlic exists.
(OOPS?!?)
 It is sensitive to frost and isn’t the hardiest of plants, so it requires specific climates to grow."
ODD, only time will tell. - AGAIN.


More here if you're so inclined.