Good advice. Go half or even a quarter of what is recommended on the label. You can always adjust up if they are hungry but to much and you might have to start over.I use Foxfarm soluble trio. Which ever brand you end up using, be careful with starting amounts.
I’m using pro mix bx and I got fr trio but was thinking of getting the whole lineMillion ways to skin a cat around here but, 1st question is how are you planning to grow? Soil, coco, hydro? And have you bought anything yet?