@Budophile, huge respect ! I grow way less , but at certain times - very intensive ;)))
When jumped to leds i was on calmag bandwagon, after 3 years i reduced it to 3 times separate from all other feedings, something of 0.5ml/L range. For just in case.
Now do 3rd grow without, one of those was without any food totally and i see that its not needed if feeding is right or soil prepared right.
I started to see correlation between overwatering in soil and magnesium, so i have epsom salt for mag if needed.
For outdoors i was adding calcium nitrate , magnesium sulfate, mono potash and few more just for plants to have, but i grow on other people land , without them knowing , so i had to add a bit of everything and visit rare ;)))
Most of my grows were done in static caravan, that tin bin get very cold even in summer night ;))) still not all plants can go into special colours, Zami GSC has it 4sure, rest is luck of seed.
Will hapilly follow till end.
Have a wonderful grow !
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