They say that small doses more often is as effective as 1 heavier dose. Its hard to say because of soooo many variables, room conditions, plant condition, and strain. I had the best luck in the 3 gallon coco pots with 1 dose at 3ml. You want to give them as much as you can without overdoing it. so it takes time to figure it out.
When I first started using
Bushmaster I would give a 3.5 mls to one plant. The next day if that plant didn't have any burning I would give to the rest of the girls.