If they are summer blooming bulbs and froze over the winter, it is unlikely they will come back. Many of those are not winter hardy below zone 8 and higher. Spring blooming bulbs are another matter - they tend to be very hardy and can take extreme cold but freezing in a container can even prove fatal to them. It depends on how cold/how frozen the actual bulb or tuber gets.

It was about 30 below, maybe a bit colder. All I can do is wait and pray they will come back. I learned a lesson. Thank goodness I have 3 more boxes of Butterfly glad bulbs and 1 purple dahlia bulb.. They will come in this fall.