I pulled up a Tuscan Purple this weekend, to both check the number of layers on the bulb and, well, because I really wanted to eat fresh garlic. It was great! It had a lot of wrappers - 3 or 4 - and it tasted great. Here in my part of NJ, we may get more thunderstorms this week. And even though the Xian and Tuscan are holding some green, I'm going to pull them up. The German Xtra Hardy and Romanian Red are still very green and robust. Leaving them in.
I'm disappointed about the Roja - this is the second time I planted it over the past several years and it always duds out in my garden. Not sure why. I like the flavor, but it never produces large bulbs like many of my other garlics have done. In total, I like to harvest about 240 bulbs for the year, but this year I'm getting about 160-170 as a result of the Inchelium and Roja losses. Garlic goes fast when I'm canning salsa, hot sauce, etc. Maybe I need to tear up some more lawn and build a new bed as insurance? :)
@Tim - I also read there is no difference in the amount of allicin in large and small bulbs, but I have read the smaller ones may be more flavorful. I can't remember the reason off the top of my head, but since I'm such a garlic fiend, I go for big, small, and in between.