Bitter ginger (Zingiber zerumbet (L.) Roscoe ex Sm.) is one of the Zingiberaceae plants that has long been used by the Indonesian people for medicine and cooking spices. One of the biofertilizers that can be used in the propagation of bitter ginger is Plant Growth Promoting Rhizobacteria (PGPR). The long harvest time makes the production of bitter ginger take quite a long time to cultivate. The…