Phosphorous is an essential nutrient which is added to soil as soluble inorganic phosphate that, in a large portion, becomes insoluble and, therefore, unavailable to plants. Furthermore, this mineral is one of the most affected by the degrading processes of the soils. Numerous microorganism, especially those associated with roots, have the ability to increase plant growth and productivity. The PSB inoculated with Rhizophora mucoronata seedlings, increased significantly the average root length by 19.09%, average shoot length by 21.26%, number of primary roots by 19.57%, number of secondary roots by 21.28%, shoot biomass by 47.33%, root biomass by 47.33%, leaf area by 44.76%, the level of total chlorophyll by 61.86%, chlorophyll-a by 41.86%, chlorophyll-b by 55.56%, and Carotenoids by 64.29%, the level of carbohydrate by 40.34%, protein by 43.56% and amino acid by25.71% as compared to control. Thus, PSB is beneficial in raising vigorous seedling of Rhizophora mucoronata under nursery and field conditions.