It depends on the particular strains you are growing mostly as some plants are more sensitive to nutrients.
A rule that I live by is,
mix the nutes at one quarter the recommended dose.
For example if the bottle calls for 1/4 tsp per gallon
mix it with 4 gallons
the following feeding mix it with 3 until u get to the recommended dose.
Dont go swtiching around from one nute company to the next as u can really hurt your plants.
You burned your plants because you fed them a regular dose without ever feeding them before.
Feed your plants the vegetative nutes in veg like you are supossed to and flush a week prior to switching to flower.
The week you switch your lights over to 12/12 give your plants a dose of flower nutes and keep feeding until about the end of week 6.
You dont need to feed aggressively until you have reached that level of your growing career but dont under feed either.
Your plants need these essential building blocks to produce plant cells if they do not have these building blocks they will produce but it will not be as vigorous or as healthy and strong. Plants can grow in the worst of conditions and still flower but to produce a high quality end product it needs nourishment.
Jay Frost
Element 4
Santa Cruz
:spacecraft: