Does it not say on the bottle? i followed my bottles instructions which is basically
Put 2ml's in per L of water use from the start of week 2 to the end of week 3
If you use it any longer it causes nute burn as i learnt
It's just a starter remember it puts in all amino acid's that most budding additives don't this helps your plant's to withheld theirself in more heat and you're plant will make better use of all nutes used throughout the whole of it's budding stage.
There secret ingredient they talk about is the amino acid's