Greenhouse: Foam panel in GH, 1 by stressbaby

stressbaby wrote:
I have used a clear solar pool cover, it can work well, but we had too much wind to keep it on the outside. I cut it up and used it inside in sections last year.

Insulating the north wall is a good idea. That 2" will give you at least R-6 which is way more than a layer of bubble wrap (R-2 at best, perhaps more likely R-1.5). A reflective coating is a good idea if available.

Pics from last year, north wall of my GH: