I do overwinter them, but I have most of the "collectables" in pots. I stop watering them when it gets cold and we leave them in a hoop house along along our fence line. We use a heater when it's really freezing. The ones that are in the ground come back each year. I have one in the pond, but the raccoons are just terrible and pull everything out. I haven't been successful drying bulbs, except for caladiums. I also keep finding little ones I thought I'd lost. I honestly don't know how they survived without water. That's one of the magical things about gardening, don't you think? There's always some little surprises to keep it rewarding!