Probably need to know what stage they are in like JamaicanHerbMan said. Although it's been about a month since you asked this question, not sure you are still looking for an answer. In my research I've read that if you keep the roots warm then you should be ok with cold temps up top. I run ebb and flow so it's probably easier with a soilless setup than with soil. Not sure if anyone has more to add or disagrees with me as the last climate I grew in was pretty fair year round and I'm just recently becoming familiar with a cold climate.

Good luck,
-dodo