You would certainly not want to put them outside directly. What a shock that would be to a growing plant! Put the bulbs back in the pot of moist soil, don't water (but close it up in a plastic bag, and put in your unheated garage or similar, 1-2 weeks. You have nice roots coming, but your goal should be not to have them grow anymore, but stay hydrated, until you can plant them outside. The more your roots grow before planting, the more damage to them that will occur when you transplant them. Because of the cold temp of the soil, plants can't repair themselves very quickly.
