Growing plants in the Rockies Greenhouse gardening at 8500ft

My idea is to insulate the inside walls of the green house and cover the whole green house with a clear solar pool blanket, the one like bubble wrap.

So stage one was the internal walls.

Initially I thought I would just do 2 ft up the sides, and the wall that wont get the direct sun through it in the winter…. the northern wall. But after seeing how thin the plastic is on this greenhouse and the heat loss it already had I decided to try and cover all side walls and leave the roof open.

Using simple construction 2 inch polystyrene insulation panels I lined the inside of the walls.

So far it seems to be working well. The outside temp can be 40F (5C) and the inside temp is around 60 F (15C). There is a heater in there but at the moment it hardly comes on, it is set at 60F. The inner side is pure white, so it seems to work in reflecting the light around quite well , and the plants dont seem to suffer at all.