Depends from outdoors to indoors and from the size of the plant.
I use mine 52/34 PK at 150mg/l indoors and its on the high end, and use 1g/liter on the outdoors one wich is even smaller but has a stronger light (the sun) and shows no signs of overdose, just a tiny bit of burn at the tips but overall leaves are perfectly healty.
Check the recomended dose on the bottle/package, and start at 10%, then next watering bump up to 20%, 50%, 100%, as long as she doesn't show any signs of overfeed you can always move to the next stage, if it starts showing burn you just do regular watering and then on next feeding repeat the same dose or lower it by 5%/10%.