The General Hydroponics Flora Series 3-Pack (1L bottles) contains FloraGro, FloraBloom, and FloraMicro . These three products provide a full-life-cycle's worth of nutrients. From rooting to flowering, the General Hydroponics Flora Series 3-Pack will help plants grow strong, healthy, and productive. FloraMicro is the foundation of the program, and provides crucial nitrogen, potassium, calcium and trace elements that new plants need. Next up, FloraGro provides nutrients that strengthen and fortify roots and solidify the structure of the plant. Last, FloraBloom encourages and enhances flavors, aromas, and oils of flowering and fruiting plants by showering plants with phosphorous, potassium, magnesium, and sulfur.