As long as the topic is rock powders, could I ask a question? Lawrence? Anyone? The only "rock powder" available around here is limestone, and it is dolomitic. My soil actually doesn't need much calcium.
What kind of "rock powders" are you referring to??? I thought maybe granite, but there is no granite anywhere around. I even went to the business that makes grave monuments...mostly granite, but all the work (and hence, dust) is done in
Georgia (USA). I do have a source and am using some azomite, but that is all that is available. Thanks for clarification.
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