Michigan orders became more restrictive because no one was listening to them and taking them seriously. Every business decided they qualified as essential, and every aspect of an "essential" business was deemed essential by extension and people were taking advantage of that. For example home depot was considered essential, so everything they did was considered essential even though most of it was clearly not, so people were going to home depot and buying non essential things just to get out of the house and have something do. They were buying furniture, paint, garden supplies, etc instead of actual essential stuff to keep their houses running. And people were going to walmart and browsing for tvs and kids toys. This resulted in more clarification from the governor over what is essential and many stores were ordered to shut down non-essential parts of their business.
I don't necessarily agree that garden centers are "non-essential" in the several week period before planting season, but they were closed off anyway. They have since been reopened though.
Also I'm getting kind of annoyed with people throwing the word quarantine around all the time. You are allowed to leave your house and go for walks or bike rides, you are allowed to go to the grocery store, you can order takeout from any restaurant, you can go to home depot, or walmart, etc. Yeah movie theaters and barber shops are shut down, and you aren't supposed to gather in groups, but you are not fucking quarantined.