Probably not. Even the hardiest forms of rosemary are iffy in zone 6. And that appears to be being grown in a container, which makes it even less cold tolerant.

Mine is currently pushing a lot of new growth.

Good point about the container, I did not think of that. One very mild winter a rosemary plant made it through. I had maple trees die in containers over winter!

In our last HIGHLY unusual freeze, where the temps got down to 10F, my Hill's Hardy rosemary, which I had put in after the previous years HIGHLY unsual freeze devastated my 30-year old rosemary, that cold-hardy rosemary also perished. It's supposed to be hardy to 0F, but nope. No dice. I've been waiting for it to resprout, but, two months later, it doesn't look like it is going to. From now on, my rosemary is going to get a lot of protection.

Dan what cold hardy Rosemary do you have? I would LOVE to find one that goes down below 10 degrees!

I've always heard that Arp rosemary is the most cold tolerant. Down to mid teens I believe. I bring my rosemary into the garage around Thanksgiving and put it back outside in March. I don't have a plant now though as mine died of neglect during last year's drought.

Hill's Hardy was found in Texas during a serious freeze. It is *alleged* to survive to 0F. Go look it up. Mine did not. Disappointed. I think I originally had Arp, and that was killed in the 4F freeze two years ago. I should say that I never protect my Rosemary because it never gets that cold. Except, these days, sometimes it does. We usually have a mild freeze every other winter. But two years in a row, now, we've had single digits. I think they're saying that climate change is occasionally now allowing the polar jet stream to drop to lower latitudes.

Thanks! I am going to try ARP, if it goes under 10 I will cover and throw in a light bulb for a little heat.

As Gardengal said, even a Rosemary cultivar which is relatively hardy in the ground will be far less tough in a pot. Whichever you choose, if you want it to overwinter outdoors, plant it in the earth.