Tell us more S. Do you have questions about making one or are you in the planning stages? What's keeping you from building one tomorrow?
"Hundreds of years from now it will not matter what my bank account was, the sort of house I lived in or the type of car I drove... But the world may be different because I did something so bafflingly crazy that it becomes a tourist destination"
I'd love to hear more too. A greenhouse is definitely on the roadmap for my property, but I have a ways to go in hashing out the details. I picked up a good book on solar greenhouses (I'm trying to avoid one that needs artificial heating etc) but there are still a lot of choices to make and earthbag building seems like it could be pretty cost-effective.
I'm thinking of a greenhouse with the north wall made of earth bags and possibly knee-height wall on the other faces. I'm a little stuck on what to do for a proper foundation to go under the earth bags though. I 'm in Zone 6 in SW Pennsylvania. Snow load is a concern but not as much as wet and possibly heaving soil that the structure would sit upon.