I know there is a greenhouse forum but I thought my fellow Tennessee gardeners might have more relevant information for my question. I'm building a 12x16 greenhouse-shed right now. I found lots of windows on Craigslist and have a considerable amount of work done already. My question is on temperatures. For those who have greenhouses what kind of temperature extremes do you find yourself with during the winter? Daytime temps vs. night time temps. I'm curious since I'm currently researching insulation to put in. I want to reduce my heat loss as much as possible to reduce heating costs.
Thanks for your input!