Jean, I think you might as well plant them out. If you don't they will certainly not 'hold' until next fall since they're already sprouted.
They may bloom this spring, but they might not bloom next year. It's hard to kill a bulb plant, so I say "go for it".
Jennifer, we cross posted - would you use a pot instead of straight into the ground so that you can grow them shallower this spring? Then plant them deeper when they're ready to go back into the garden? That's a good idea.
