These are starting points your actual usage depends on your particular circumstances. In general to enhance vegetative growth, use more FloraGro and less FloraBloom. To enhance flower and fruit production, use less FloraGro and more FloraBloom. To accurately measure nutrient strength you must obtain a nutrient testing device.
Seasonal usage depends on the stage of growth, the crop grown, and climate.
There is specific usage information on each bottle for individual crops. One part is defined as 1 tsp or 5 ml per gallon of water.