General Hydroponics FloraMicro, 6 GallonThe foundation of the building block system. FloraMicro from General Hydroponics provides nitrogen, potassium, calcium and trace elements. Combine with FloraGro & FloraBloom . Just like people, plants benefit from an appropriate diet. But different types of plants have significantly different nutrient needs, and these needs change during each growth cycle. So what's the best way to keep your fruits, vegetables and flowers happy and healthy? Flora