Microblast is a proprietary liquid micronutrient formula to be used to prevent and correct micronutrient deficiencies. It is naturally buffered for assured plant absorption. May be watered in or used as a foliage spray. Contains: 0.5% Water Soluble Magnesium, 0.02% Boron, 0.0005% Cobalt, 0.1% Water Soluble Iron, 0.05% Water Soluble Manganese, 0.0005% Molybdenum, and 0.05% Water Soluble Zinc.