Unless you're a professional grower and perfectly control the nutrient concentrations that the plant requires in each flowering phase, I would advise sticking to the chart created by the fertilizer brand (in this case, Advanced Nutrients) which indicates that the maximum is 1.5 mL of BIG BUD per liter of water. Otherwise, depending on the other fertilizers you use, you could cause over-fertilization on the plant, achieving the opposite effect of what you want, which is to get less dense buds.
I hope this helps :)