Mixing Magnesium Salts and Calcium Nitrate

[Ray]

It’s all about concentration.

In a 100 ppm N solution, MSU RO contains about 60 ppm Ca and 22 ppm Mg. At that same N concentration, K-Lite has about 77 & 31 ppm, respectively.

The ”K-Lite Knock-off calculator” is intended to give approximate proportions of DRY ingredients (which is the way the fertilizer is sold). You then take a small amount of that and dissolve it in a relatively large volume of water to create your application solution.

It takes 0.77 g/L to make a 100 ppm N K-Lite solution, or roughly 2.9 g in a gallon - that’s a bit over 1/2 teaspoon. I make a concentrate that has that much powder in an ounce of RO water, yet it is still stable and does not form a sludge. Of course, we need to recognize that many commercial fertilizers contain citric acid to enhance solubility.