not everyone is an expert at using advanced nutrients. there is no exact science of application of fertilizers. Only the plant and plant itself, tells you how she is doing and what she needs. Dosages on fertilizers are a guideline. I grow with advanced nutrients, heavy 16, Humboldt, and the list goes on. I know whose and what products are good and whats full of bs or crap. Dyna Gro will indeed grow a plant, but advanced nutrients and some others that will out perform the dyna when used properly according to what the plant needs.