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Organic Sul-Po-Mag (0-0-22) also known as K-Mag NATURAL is the commercial name for the mineral otherwise known as sulfate of potash-magnesia (langbeinite).
January 1, 2013
If you'd like to know, "Where can I purchase mushroom compost?" you might not be asking the right question. Instead of where can I purchase mushroom compost, perhaps you should be asking, why should I purchase it?