I had a neighbor in Cache Valley that used to plant corn in February. Four years in five it froze. But that one year in five that it survived gave him the earliest corn in the valley.
So far, it's looking like it would have been a great year to overwinter fava beans... Too bad I only planted a few seeds. I did however plant an overwintering crop of garden peas. Some of them are doing great! It's one of my breeding projects, "Winter Hardy Garden Peas". It's a project that I've been working on for 4 years. I hand pollinated my earliest shelling pea with an Austrian Winter pea. I finally have enough seed to restart the winter-hardiness testing.
This is one of the parents of the cross... My earliest shelling pea. Starts flowering on the 7th node.
This is the other parent...
I know, it looks delapidated. This photo was taken a few days after the winter snows melted. They overwintered!!! And have for 5 years now.
The great-grandchildren are currently in the ground. Some died already. Some are thriving. I am looking for a super-early, winter-hardy, garden shelling pea.