When garlic stalks are about half yellow it's time to take them out of the ground. If you leave them in the ground the garlic heads will rot. Once out, you are supposed to hang them in a cool, airy, shaded location for a couple weeks to finish whatever it is they do. Some of the heads look a little small compared to the gigantic ones you see in the grocery store. One reason may be because we didn't cut the garlic scape early enough to promote the head to grow.