its not that expensive they and just want you to buy the whole package....I use the accelerate (34.99), Expand (55.99) and punch (37.99) for veg and for flower I taper off on the accelerate and use expand, punch, and strengthen (16.99) for flower. I buy 32 oz of accelerate and Strengthen and gallons of punch and expand. Once a week I foliar spray with their Professional ($35) but IDK if that's completely necessary, but my plants sure seem to love it. I have been through 3 cycles using this method with different soils and my results just keep getting better