my mom's ex bf used to take his plants and put them out in the cold weather on the porch for 10 minutes at a time. It was like 30 degrees outside. It used to make the plants create more trichomes to keep the plant alive. Techinically pot is one of the last green plants around when it gets cold outside and thats how hunters find it growing sometimes. If the plant has no bud then it would die but if they have buds then the buds will keep the plant alive.
try putting it in the fridge for 15 minutes at a time for a few times a day.