yes definitley man, around 45 degrees plants start to turn purple, lower than that your getting dangerous, anything below 32 will kill a young plant and effect the buds of others, one time i let it go to long (i live in northeast usa so it gets really cold by sept) and it got down to like 20 degrees. the buds were badly frost burned, it wasnt horrible tho, still got me stoned cept didnt taste the same, that was 8 ball kush i did that with from barneys what strain do u have