When you reach the apex of your flowering cycle, cutting your nitrogen, booting potash and maintaining phosphorus gives your plants their best chance for success in achieving your desired yields. Meet Peters® Professional Hydroponic Finisher. This is is a no-nitrogen formulation that allows growers to reduce nitrogen so that plants focus their energy on fruit and flower production to maximize yield. It is 25% more concentrated in P, K, Mg, and S than the competition, which reduces nutrient density and salt buildup when compared to competitors.