Overwintering Container Plants

[DonnaMarieNJ]

I have several plants in small containers outdoors (the containers range from about 6 inches to 15 inches across) that for the last number of years I used to overwinter indoors. The plants are sage, rosemary, thyme, oregano, blueberry, raspberry, and a perennial grass, all of which were purchased young this year. In the past, I have tried to overwinter these varieties indoors and the plants struggled and sometimes died. This year I would like to leave them outdoors, if possible. There is no protection for them, so they will be exposed to freezing temps, wind, snow, etc. Should I water them regularly throughout the winter? Or maybe only once a month? Or should I move them all into the garage out of the elements where there will be no light and no watering available once the snow comes (and I can't open the garage door)? New Jersey is expecting a mild December, but I am concerned about the remaining wicked winter months.

I am afraid that the small containers will not protect the roots from the elements.

I also have a very nice celery plant in a container, as well.

Any help appreciated. Thank you!