Yeah i agreed dave carrot can live where ever, even in the place where not cold !I'm in Maryland and I have had success with some plant surviving. I garden in raised beds and I use floating row-covers over some of the beds over the winter.
Carrots will last in the ground over the winter and can even be harvested then too. Like larry said, gralic will over-winter for the next year as will chives.
I use row covers and grow spinach and kale over the winter. Plant them late in the summer. I am still harvesting carrots and spinach from last fall. Oh, and French Sorrel was something I tried for the first time last year, that over wintered too and is still doing great.