SOOOO many different ways growers approach this topic. The one thing i will say is this. Every grower is correct. (Providing you are following standard procedures). Never let any other grower say your doing it wrong. If you are anything like me. You will know if its wrong by listening (Visually inspecting your crop) to your plants. SHE WILL TELL YOU WHAT SHE NEEDS.
So as a Mutli lighting grower. I have to keep track of how much food goes under what light. Example My flower areas are LED. Now many people say “You use 25%less nuets” due to the intensity of the light. (Please remember things like Temps, Strain, Co2 many factors at work here) It will cause more burning.
So I tend to use my own mix. I dont “really” use any big name companies product line. Not to say i dont have some stuff kicking around here. I have found it more cost effective to use powdered NPK ingredients.
WARNING THIS IS WHAT I DO, I DONT RECOMMEND IT UNLESS YOU FULLY UNDERSTAND what these ingredients do.
So for veg we use Fish emulsion, Mycorr, Urea (I know i just made some of you cringe, lol), Humic/fulvic. Pretty much it. I really try to keep as organic and clean as possible. Even my PH up and down, Sodium carbonate and Citric acid.
Flower, well full on flower. Beyond transition that is. It will run Muriate Potash and some Triple super phos. Maybe some liquid compost, and a homemade tea (guano,ewc,calmag+, molasses)
Transition i will usually add some nitro week one with Monopotssium phosphate. Higher Nitro week one. tapering down by week three. which is week one btw.
Geez all that said just to get to the point. How do you feed? Do you use commercial brands? do you make your own? Do you PPM/TDS? or just follow suggested amounts?