SE Iowa, zone 5

Last fall we purchased a couple of hundred tulip bulbs simply because
they were on sale at Menards or somewhere similar. As happens many years
we never got around to getting them planted last fall. They are all
still in bags in our shop (about 50 degrees F) and some are starting to
sprout.

Can we save them by doing any of the following?

1.) Simply plant them as is in VERY early spring.
2.) Stick them in our deep freeze until spring and then plant.
3.) Bury them outside under some mulch and then plant in spring.

Anyway suggestions would be welcome.

Cheers,

us