Thanks to all of the info I've found on this forum, I was able to build a small greenhouse for overwintering my temperate bonsai here in zone 7A. I am hoping to also house tropical trees in spring to create enough humidity for aerial root growth as well. Since it is so small—barely a greenhouse by some standards, but better than a plastic covering over pvc—any suggestions or recommendations for heater and thermostat? I used Tuftex corrugated polycarbonate, but I'm not sure about its insulating properties. I have a vent at the bottom and another on top at the opposite side, as well as 2 muffin fans (110 com) for circulation. Any comments or suggestions are welcome and appreciated.
