Langbeinite is a mineral that is made of important nutrients for plants: potassium, magnesium, and sulfur. It’s found only in a few places. In the U.S., langbeinite is extracted from mines close to Carlsbad, New Mexico. K-Mag is considered a natural potash fertilizer with a redish color. OMRI listed

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1.5 Cups, 1 Quart


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