makin it kinda tricky to answer your question but ive recently changed Calmags and now i use a calmag plus with kelp and iron during veg with a (4-0-0). for flower i have a real low Nitrogen @ (1-0-0). i also have magnesium sulfate (Epsom salt) but i prefer calmag throughout the grow/flower. i believe its the Nitrogen you want to cut out in flower