The soil on the floating islands in the Truong Sa archipelago is composed mainly of corals, which are poor in nutrients. Plants growing on this soil are also less diverse, with only a few specific species that can adapt to the harsh natural conditions of the Truong Sa archipelago. In particular, for the new soil accreted due to activities aimed at socio-economic development, national defense, and security here, very few plants can grow on this type of soil. In addition, due to the influence of the climate, the plants grow very slowly. Some physicochemical characteristics of the soil, such as pH, EC, and OC, have been changed when adding inoculants and additive materials. Some food plants, such as morning glory, spinach have developed and grown well.