You must have had much better weather than I did, here in NE Mississippi. Garlic does best when the last 4-6 weeks (before harvest) is on the dry side. We had prolonged cold and extremely wet weather all winter and into spring and the ground just didn't dry out. My garlic harvest was probably 40% lighter (smaller bulbs) than the previous year. I grow my garlic in a raised bed and in large, 20-30 gal pots.
