What is the difference between a “Vegetative” formula and a “Bloom” Hydroponic nutrient formula?
The main difference is that growth or vegetative formulas have a very high percentage of nitrogen in relation to phosphorous. A typical growth formula will be something like 20-10-20, or 15-10-13, for example. A typical flowering formula would be something like 6-3-30, or 3-38-38. The bloom formulas usually have a higher percentage of both phosphorous and potassium than that of nitrogen.