Fruit Trenches are just an attempt at cheap walls. There is no geothermal going on here. I'm not sure if it would work out cheaper. Certainly not for a busines

Fruit Trenches are just an attempt at cheap walls. There is no geothermal going on here. I'm not sure if it would work out cheaper. Certainly not for a business. But even for a hobbyist possibly not. I'm not sure it's even interesting as a display garden. The bio-hacking (breeding) of plants is cool though.