Sul-Po-Mag (50 lb) 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).
Test only Mushroom Compost (100% pasteurized)
January 1, 2013 Affiliate – High Mountain Compost
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High Mountain Compost