Do you have greenhouses? We've got 100~ days to grow outdoors. We put potatoes in in March in the greenhouses. I planted the first round of taters 10 days ago and they've already endured -4º (outdoor temp at least) but seem to be growing fine still. They're under a lot of mulch. I've already direct seeded onions, beets, favas, radish, lettuce, kale, broccoli, cauliflower, spinach, etc. Also just put in garlic bulbs. But only in the greenhouses! Within the next month more will follow. Peas, carrots, turnips, parsnips, cabbage, and many others will be direct seeded soon.
I have to wait til May or June for the snow to be gone to plant outdoors. But I start the toms and such indoors at this time, for transplanting into the greenhouses. Greenhouses really make growing in cold climates a lot easier
One trick I like is planting early in pots and feed bags. I like doing my corn this way. I can start them inside and mvoe them out when the weather breaks. I can pick up and move them in out of the weather if we're going to have an unseasonal snow or hail storm or something, which is common in June. Or if the cows come chomping through >_>
You can start your plants in a feed bag with 2-4 gallons of substrate, and by the time you're ready to plant outdoors, you've got a large, well started plant in the bag. You can bury the feed bag partially, or even just set it on some loose soil, and the plant's roots can go through the bag and continue to grow in the ground without having to suffer transplant shock. Though if you do it that way and let the roots grow out, obviously you can't move the bag around without hurting the root system. But, you can rip it out of the ground if there's a tomato plant in it that needs a little more time before it freezes. The destruction of those peripheral roots will shock it into finishing its fruit. You can bring it inside at that point and prune it heavily. I've grown tomatoes inside through the winter with some success. Anywho, the woven feedbags are reusable as long as they're not getting torn up. We have loads of them so we use them for lots of stuff!
Starting early indoors is a great way to get an edge on the growing season and also sate the green-thumb itch that sets in every winter