Q.potted herbs over winter
I am growing thyme, sweet basil, rosemary, and chives. Since I live in Michigan, can I put the pots in the garage over winter and will they regrow and survive in the garage over winter?
You can attempt wintering over in pots with your chives and thyme. Chives will have the most success.
Your Sweet Basil is an annual and Rosemary is very difficult to winter over in our cold growing zones.
I would recommend bringing your Rosemary inside and continuing to care for it. With proper care you can keep a plant year round indoors.
Here are some links to help you.