New grower here going all organic with purple cow indicanja and roots organic terp tea bloom nutrients. The soil should carry me along for a good while and then I’ll be making compost teas. My question is should I have cal mag on deck and ready? Should I just add it to my nutrient regimen? Or wait and see if a deficiency pops up? Seems to be marketed heavily so are they just trying to sell me more nutrient bottles or not a this a real big issue I should be concerned with?