Maina right here keeping them in the shed is good, you can also put clear plastic bags over them it kinda acts as like a greenhouse by keeping heat in but also letting sun in too. We've had a couple frosts up here i think 2, but ive heard that that's good for the plants cuz it tells them winters coming and it makes the ladies squeeze every little bit o thc right out...what are your trichs looking like if you know? One more thing if your going balls to the wall, i got this thing called liquid copper fungicide and i read on the back not only did it prevent all types of mold etc it helps protect plants from a frost, i just have a bottle of concentrate that i dilute and put in a sprayer. good luck on your harvest and maybe you can come up for harvest fest this weekend!