RE: After a brush with Covid, it's back to blogging for me!
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Yeah glad I have the polytunnel but in this cold wet snap even that's not enough. Wish I could afford some polycarbonate sheeting...
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A permanent structure that you can heat is a dream of ours too. I'm doing a post on a DIY solar heater soon that you might be interested in.
Oh yes let me know when it's done!
I do fill a black bucket with water/comfrey etc and put it under the seedlings in spring. Heats up during day, releases warmth at night - at least that's the theory. Who knows if it works.
That's an excellent idea. It's called thermal mass. I know folks who have black drums full of water or sump oil to absorb heat in the daytime and radiate it out over night. Your technique may also generate a little heat through the fermentation.
There's an old technique to make ice that uses the principle of black body radiationt o make a black object put out more heat than it stores. It was used by settlers and folks in arid lands to get a little cooler.