I live in Wisconsin in a zone 6a area with a 10x12 HFGH. I was going to use 3/4 inch foil faced insulation on the north wall and cover the rest of the greenhouse with 1/2 inch bubble wrap. With a minimum temperature of 0 degrees (and sometimes lower) in winter, would I be able to maintain a temperature of around 50 degrees with a couple of space heaters? Also, would the bubble wrap reflect or block a significant amount of light? If this isn't enough, what more could I do to for insulation while keeping as much light as possible going in?
The bubble wrap