Love this greenhouse. Put the biggest size I could. Challenge for us was the foundation. Ended up putting concrete at the corners, then using some treated wood to ensure stability and balance. As we have mice and squirrels that like to eat everything, we put gopher wire, then landscape mat and then some plastic pavers with small openings. These then held the small pea pebbles we used as the top layer ensuring more stability with in the greenhouse. It is a big job to put this together. We got some help which took a full 2 days. Totally worth it. I’m super happy!