Mike: Many of our vegetables have a  cold response that causes them to bolt to seed. If it happens early in the crop's life, there isn't much to eat as the plant heads to making seeds as fast as it can. This is generally a spring issue for farmers. Basically, the crops are semi-biennials (mustard, beets, and several others) that show that. Few need to go through vernalization to germinate in the first place. That is the impact of hundreds if not thousands of years of human manipulation and selection of seeds in the various groups. That said, keeping seed cold in storage extends the vigor of seeds. Vigor decreases faster than germination rate.  That's why cold seed storage is preferred in the industry. 

For  an interesting piece on the cold response to bolt see https://www.canr.msu.edu/news/bolting-in-spring-vegetables#:~:text=Beets%2C%20chard%20and%20spinach%20were,for%20one%20to%20five%20weeks. 
I suspect Michigan has some 5a climates though warmer springs and summers. Hope this helps. Let me know if you have  any questions. Chip Bubl  OSU Extension Agent/Columbia County (retired)  <personal data hidden>