Hi all, I live in a continental environment at roughly 48N. Needless to say, the winters get pretty cold with it not getting warmer than -20C for about 6 weeks during the winter. I'm starting to think about systems to accommodate this environment that are as energy efficient as possible. Specifically, a greenhouse seems as good a place to start as any. I'm looking at a mash-up of technologies to use which include: A soap bubble insulating greenhouse structure similar to this: https://www.tdc.ca/bubblegreenhouse.htm A built in composting system for heating through the winter and also a ready supply of compost in the summer. Similar to this: https://www.builditsolar.com/Projects/Sunspace/NewAlchemycompost.pdf but without the bio-filter and air circulatory system and using a heat exchanger instead. Venting the compost and greenhouse air intakes and exhaust through the thermal mass of water to recover waste heat and use it to preheat the -30 fresh air. Parking my chicken tractor in a section of the greenhouse over winter for further heating and maintenance (weeds, bugs etc) which is why I'm keeping the compost gasses out of the greenhouse. Putting my worm farm in the greenhouse so it doesn't freeze solid. I'm thinking of placing hanging columns of mulch for growing as much variety as possible, a herb spiral for my herbs, the floor for veges that won't grow vertically and so the chickens can roam as freely as possible underneath the hanging plantings. I can use the top of the composting chambers as seed raising beds. There are a few things I am trying to figure out and these are: Is there a resource anywhere that identifies what plants grow vertically? I know strawberries, tomatoes, lettuce do. Is it worth planting something for the chickens to dig up and eat or will they just rip through it in a matter of a few weeks? I was thinking of something that drops lots of seed and grows quickly. Maybe flowers (poppies?). If I put a pond in there, will the chickens foul the water or eat the aquatic plants?