Five years after building a partially-underground greenhouse in Bozeman Montana, I've taken a video to show how it has held up and how we're using it this winter. So far, so good. If you're wondering why the slope of the panels is so shallow (not ideal) given our northern location; we did it to hide the greenhouse behind our raised garden and also to provide more planting space inside. If neither of these factors mattered, we should have installed them more upright..