SUPERthrive Mag-Pro in a 1-quart bottle is a popular choice for gardeners looking to boost flowering and fruiting in their plants. This concentrated formula is rich in phosphorus (2-15-4 NPK), a crucial nutrient for flower development, along with magnesium and sulfur, which contribute to overall plant health and nutrient uptake. The quart size is convenient for home gardeners and tho... https://www.hydroponicstown.com/dgmp-032-superthrive-mag-pro-1-qt