I recently read that these types of beds can be heated with horse manure as well. You dig 2 feet deep and manure to about a foot deep, then cover with dirt. As the manure breaks down into compost it gives off enough heat to keep the enclosed bed 90 to 100 degrees in winter, or at least that is what the book claimed. After it's not heating the bed any longer you remove it and use it as compost, then you can just use it as a cold frame or start the process over.
I recently read that these types of beds can be heated with horse manure as well. You dig 2 feet deep and manure to about a foot deep, then cover with dirt. As the manure breaks down into compost it gives off enough heat to keep the enclosed bed 90 to 100 degrees in winter, or at least that is what the book claimed. After it's not heating the bed any longer you remove it and use it as compost, then you can just use it as a cold frame or start the process over.
friend2animals66 3 months ago