When plants enter the blooming phase their nutrient requirements change. Sensi Bloom contains everything your plants need as they flower and approach maturity. Increased levels of phosphorous and potassium encourage a full and bountiful bloom and heavy harvest.
If you have an optimum growing environment and want to achieve the ultimate results then combine with Advanced Nutrients' Bud Blood, Big Bud, and Overdrive.
Use 4ml per litre during weeks 1 through to 6 of the flowering stage