A4
Looking gorgeous dannyboy. I normally start adding PK boosters right when flowering starts, slowly tapering the strength up. Like you said, it is going to depend on how the strain reacts to it. It is also going to depend on what boosters you use. Like KoolBloom Dry, the plant ain't going to take that but once maybe twice and you are going to fry her. KoolBloom liquid though, can be used throughout flowering.