organic soil.

Hi hi, so here is the dealio. I am having a hard time deciding who to flower first. I started from seed. Pre sex indicating all females. ~90 days old 1000w full spectrum LED 10w UV LED 2.5x2.5x7ft Lollipopping Multiple toppings and LST 5 gallon fabric pot with organic soil Room temperature...

Im doing my first organic grow with coast of Maine pro mix. My girls are in wk 5 of veg and some deficiencies have showed up.From what it looks like its something cal/mag would resolve. But since this is organic soil Im wondering if adding this would be a bad idea? Is bonticare cal/mag plus...