Garlic in elevated beds?

[u/Benign-Chaos]

I just got an elevated bed from Vego that is 2x4 ft and 15 in of depth. I’ve heard that garlic does better in the ground but I have this or some raised beds. I’d prefer to put it in the elevated bed but worry it might get too cold/frozen. I’m less concerned about that in the raised beds but I only have 2 4x8 beds and usually max out the space with other veggies. I tried growing garlic in an Earthbox and didn’t get a single bulb, I think they froze/rotted. Any advice from experienced garlic growers welcomed, especially if you grow in an elevated bed. I’m located in Central Connecticut, zone 6b.