Garlic 101: Our garden came with lots of free growing garlic-the old owners used to store the harvested stuff in the garage (after almost a year we are just now getting the stink out). This site explains how to propagate it, harvest it, plant it-you name it. Very good info here. I plan to keep ours growing, and planting more, supposed to help keep the animals away. We shall see, it's just not going in the garage!! ha!
Growing garlic from bulbils. I may have to try this with some of the hard neck garlic I bought to plant this fall. It sounds like 1 or 2 is all it takes to get a large amount of cloves in 2-3 years that are adapted to your microclimate.