Big Up Powder 0-33-23 Bloom Booster is specially formulated to efficiently deliver high levels of phosphorus and potassium to the fruit or flower. Big Up Powder is designed specifically for the first week and final weeks of the flowering period. Plants are in a transitional phase during this first week. By introducing Big Up Powder in the first week of flowering, you effectively flip the switch in your plant, sending it immediately into an intense flowering cycle. Big Up also provides the final boost of energy that your plants need to finish the bloom cycle with some of the largest flowers you have ever seen.