I think balance is the key, to much of one nutrient or a combo of too much can lock out another. I use a lot of cal/mag through flower and I almost always see a Potassium Deficiency in the last weeks of flower when I really want it to take in more so I will use a lot less next grow

This is a good article but not exactly an easy read for me. I would like to find a chart that is easier to read.

https://www.cannagardening.com/interactions_between_nutrients