first year for my new 6 x 8 Harborfreight greenhouse and we even calked all the seams. Raced around today putting all the plants inside because it's going down to 44 tonight. It's 54 out right now at 2 AM in the morning. The greenhouse is the same temp. I expected at least a few degrees warmer. I know I can bubblewrap the sides etc but I expected the calking to help. I'm very surprised. Not sure if I throw those emergency mylar blankets over the plants maybe that will provide a few degrees? I plan to use lightbulbs or a small heater later but that may be like heating the great outdoors given my experience tonight.
If I bubblewrap it does the sun still warm it during the day? And what thickness of bubblewrap is best?
