Yes, I can get fill dirt but over time it will compact when it rains and the 4X4s will start sink causing the greenhouse to lean no matter how hard I compact the dirt it by hand.
That's why I had the idea of Pier blocks. I can dig holes for them and still use the fill dirt to level it out but the pier blocks will prevent the weight of the greenhouse from pushing down on the fill dirt.
I think I'm going about this right.......... Maybe not, I don't know anymore..............
