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This is a discussion on Can regular lump charcoal be used in orchid mix? within the New Growers: Ask the Senior Members forums, part of the New Growers category; I'd only use it if it said that it was made from hardwoods. At one ...
I'd only use it if it said that it was made from hardwoods. At one time I made my own. I had a pit that I put (mostly) oak limbs into and set on fire. then I flipped a piece of steel over it when the wood looked like it was fully ablaze for a minute or so and the next day I broke it up and sorted it. It's a lot of work but I was much younger and good charcoal was hard to find. I'd make about 5 cu. ft. in several batches before I graded it. That was a long and dirty process.