I know, I have not finished the first greenhouse. But it is so big it will be too hard to heat for the early plants. So I am building a smaller one!
It is 12'W 24'L 11'H, the sides and North end will be covered in dirt for insulation.
This is were I got after a days work on it, my brother spent most of the day on the loader hauling dirt over, which was a big help!