Hi there @ducksaplenty! Welcome! I lived in Minnesota for 4 years so I understand the cold! We are in North West Washington State, right near the ocean. We are so new to gardening and learning as we go... One thing that really helped out planting timing was learning about planting hardiness zones. Where we are, we are in zone 8b. In Northern Minnesota, the hardiness is in either zone 3a or 3b depending on where you are located.

While zone 3 is great for greenhouses, sometimes they are not always an option. We have a friend out here that made raised planters and covered them with glass doors over the winter last year to build a small, makeshift greenhouse. Without a greenhouse, you'd want to look for plants that are considered 'very hardy' but still cover them with a good amount of straw to keep the frost/snow from damaging the crop. Things like carrots, beets, rutabagas, parsnips, and turnips may have some luck as long as they are covered well.

We use an app called 'Seed to Spoon' that we love that also gives us a lot of information on winter crops, it has helped so much since we are new in the gardening world.

Hope you have a wonderful week - and good luck with your plants! Please let me know how it goes!!