I have no frame of reference to say if these nutrients hit the spot or not but she grew well and was happy. I guess they could say use 2ml per litre instead of 4ml as I went by that and gave too much and that also means it costs more as I'll have to get more before I expected to. I personally didn't see much of a difference if any using the big bud but that may be down to a lock out or something I don't know lol but it's all over now anyways.