High phosphorous causes a nitrogen lock out. Thats why you flush coco with things like calcium nitrate and water.
Not a fan of coco myself but some added to a mix is fine. No soil (dirt) whatsoever goes in my pots though. At least not inside. Outside i add my own compost and aged pine bark fines.
All these fancy nutes and sofar my largest pull off one plant was with a gallon jug of Alaska Fish emulsion 5-1-1, Chick N Poo 2-4-3 (8Ca) and Alaska MorBloom 0-10-10 plus cal/mag. Thats enough to last me over a year and numerous plants. A small bag of Growers Recharge to boost the soil microbes occasionally too