I don't know about all this. I still have a feeling that true "green garlic" was grown from the scapes and not from cloves. But since I have never grown from scapes and never have "harvested" my garlic in the winter, before it ever truly develops, I really don't have an answer. Personally I cannot imagine taking my garlic from the ground before it forms full bulbs. That kind of seems like I would have wasted my money, time, and effort, since the cloves I planted are not inexpensive. Now growing from the scapes (and these would have to be hardneck, since the other varieties I have did not form scapes) would make a whole lot better sense. The scapes I have are basically FREE!
Now y'all have created another experiment for me. I just have to plant the scapes , and will do so all summer long, and see what develops.