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Lets say it is a climate controlled, dark environment. Do the nutrients separate over time (molecular weight) and if so, how long does the average bottle of NPK stay good for? Also curious about organic ingredients. Specifically I have some Fox Farm grow big and tiger bloom, but they. are getting on two years old. I also just bought a box of Roots Organic bottled and dry stuff but the microrgegonism dry amendment had  “Best By 2018” hand written on it. Would that make their other bottled nutrients o good now if they are that old or how about cal/mag? I have excess of that as well that is over a year old. Should I toss it all or is it still beneficial?