Emerald Harvest Cali Pro Bloom A+BRich in phosphorus and potassium Cali Pro Bloom is greater in phosphorus and potassium than its nitrogen filled counterpart Pro Grow. Phosphorus helps a plant convert nutrients into smaller, more ingestible parts, reducing stress and dramatically enhancing nutrient uptake. Potassium regulates photosynthesis and supports the flow of water and nutrients around the entire plant system. Gardeners looking for greener, stronger, more oxygenated plants need