In this picture you can see what was harvested from our unheated greenhouse on January 31st, 2021. That’s broccoli, swiss chard, kale and arugula, and it was all grown in USDA zone 6b in a cheap, leaky harbor freight greenhouse with no added heating – no plugged in heater, no propane, no in-ground geothermal heating systems. Don’t get me wrong – I’d love to have some sort of geothermal heating system or thermal storage system (like 1000 gallons of water in black tanks) that would allow the growing of much more than just these very cold hardy plants, but I’m pretty happy with this haul. I added in some lentils that I had sprouted in the kitchen and it made a pretty good salad.
I’m mostly interested in producing fresh food in a manner that allows my household of 2 people to be able to eat freshly harvested food daily instead of growing large quantities of food that could be stored for later consumption. It’s very interesting to me to see how much food could be produced even in the dead of winter, and part of what gave me the courage to try this was the video done by a man in Chicago who called his youtube channel One Yard Revolution. I heartily recommend that you watch the video below!
SolarRationalist 
Lovely broccoli.. Wish I liked vegetables.. Jan
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