Miracle Gro = Ammonium Sulfate, Potassium Phosphate, Potassium Chloride, Urea, Urea Phosphate, Boric Acid, Copper Sulfate, Iron EDTA, Manganese EDTA, Sodium Molybdate, Zinc Sulfate.

Soil Mender Liquid Fish = hydrolyzed fish.

Why would mixing these together in the jug of my hose-end sprayer cause the mixture to become very cold? Nothing else added.

  • $\begingroup$ Endothermic dissolution. $\endgroup$ – Mithoron Jul 2 '18 at 18:14

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