I have taken to doing this every year. The bulbs cure beautifully all by them selves if dug anytime after flowering and allowed to dry off with the foliage attached. I have found that the foliage need not even have started to yellow, but best bulb size happens when that is allowed to proceed a bit. They store at room temperature (dark is best) until planting time next fall once completely dry. They get newly reworked and refertilized beds every year and bloom dependably. It is also my impression that they multiply better if planted shallow, too. I replant them when I plant my garlic which is normally mid October. I actually use the same procedure (old window screens in a shaded by airy screen porch) to cure my garlic later when it is ready to dig, also onions and potatoes in their turns. It gets pretty hot out there at times during the summer. In the mean time I have an additional flower or vegetable bed to work with.