I have been thinking of adding on a green house to the south side of the house. This is just a dream, but you never know. I have solar panels I would put up on the roof or wall. And I saw a number of videos on what is called a rocket stove. I would love to heat the floor with that. And have that room flow heat into the house in winter. Oh, but it is just a dream.
I also did an experiment. To regrow lettuce from a store bought product. For a post I saw on facebook. I cut off the tops of a red leaf bunch of lettuces, and some green onion.I added enough water to cover the core. about an inch or so. And in s day or so you could see darker green develop in the center. .
With in a week this much has regrown. So It works.
I think what I love the most about this is it puts spring time in my kitchen window. With snow all over the ground on the out side . So I look at it and smile.