One very cool (literally) bit about living in Minnesota is being able to grow lots and lots of tulips. Tulips need either a period of really cold weather or for some of them actual freezing in order to bloom.
Remember those bulbs that were pushing up through the frost a few weeks ago? Here they are last October. In a typical year we’ll plant 1200 to 1600 bulbs and they all have to be in the ground before it freezes.
But so worth it come Spring!