FloraGro builds strong roots during a plant's vegetative stage.
FloraMicro is used during a plant's growth and bloom cycles.
FloraBloom is added while a plant is fruiting and/or flowering.
if you calculate ppms of what each provide or they provide that data for you, you can mix the three for various stages of your plants life cycle.
I think they have a feeding schedule? consider that the 'ballpark' and you'll need to adjust to what the plant says, your environemnt and auto vs photo considerations.