I have been buying ready mix concentrated hydroponic solution at an indoor hydroponic store for years but lately I have been using 1 teaspoon. per gallon of water of Miricle -Gro for Tomatoes with 1/4 tsp. of Magnesium Sulfate. I will also add ¼ tsp of calcium chloride when I get to the nursery as descibed by Monty the Mooch
Ron
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