If going coco hempy I strongly advise using Canna Coco since it is pre hydrated,pre rinsed,pre buffered/charged with Ca and Mg,and Canna's Coco A and B and pk 13/14
Feed everytime you water (no plain water) and pH the nute solution to 5.5 and use an EC/ppm if 1.0 to 1.5/500 to 1000 ppm,but start at 1.0 EC.
All you'll need is the Fliramicro and Florabloom and some Cal/Mag or Epsom Salts.
Mix 6ml/9ml per gallon of water making sure to add the Floramicro first,shake/mix,then the Florabloom and shake/mix,and then 1 gram per gallon of nute mix Epsom Salt,tgen pH the mixture between 5.5 and 6.0
Oops my last post would be if you're in Coco hempys with GH nutes.
In the perlite/verm hempys you can use the Lucas formula which is also just Floramicro/Florabloom @ 8ml/16ml per gallon of water.You'll also want to add some Cal/Mag.