Monopotassium Phosphate (MKP) 0-52-34 is a nitrogen-free, 100% water-soluble P-K fertilizer — a single technical-grade crystal (potassium dihydrogen phosphate) supplying 52% available phosphate (P₂O₅) and 34% soluble potash (K₂O) with no nitrogen and no fillers.
The zero-nitrogen profile is what defines MKP: at flowering and fruit set it
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Im using this bag for growing crystals but im going to buy another 2lbs bag for next veggie season