Rustic By Nature built a pallet greenhouse in Alaska with a rain gutter grow system for watering. It’s very low cost, simple and easy to build.
“This geothermal greenhouse design worked perfectly through our negative 17 degree winter weather here in SE Idaho. I couldn’t be more pleased with the results. It is affordable and it works. Two things that I love when they come together.”
A simple greenhouse design by Urban Farmer Curtis Stone that is fast and cheap to install. Also known as Caterpillar Tunnels. Cost is about $1,000 for a 12’ x 100’ poly tunnel made with 1-3/8” galvanized top rail tubing that’s used on chain link fences. Metal hoops are 4’ apart.
It would be easy to strengthen this greenhouse design with rebar. The same basic idea could be used to build low cost ferrocement housing, shop space, etc. by adding rebar, small mesh and cement plaster.