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This study is planned to assess the future carbon storage potential of mixed garden systems for campus open spaces through an estimation approach by assessing 10 tropical fruit plants developed on community plantations around Buleleng district. Three trees were selected for each type. Each tree was measured for its physical dimensions including diameter at breast height (DBH) and tree height. Soquatil carbon was also using the Walkley–Black method in a subset of plots. The relationship between soil chemical properties and soil SOC potential was also analyzed. It was found that the potential carbon stock of trees ranged from 8 to 4915 Gg ha-1, with the smallest average potential value being soursop trees and the largest average value indicated by durian trees. The average soil carbon stock in the observed campus area is 440 Gg ha-1. If the combination of four tropical fruit crops with the highest carbon storage potential (durian, jackfruit, rambutan, and sapodilla) is selected and planted proportionally, it will provide a carbon storage potential of 2101 Gg ha-1 in trees. This study also found the relationship between physical and chemical properties of soil with SOC. The finer particles affect SOC. All soil chemical properties which were negatively correlated with SOC were also negatively correlated with CEC. Except for the N-total which is strongly positively correlated. N-total with other soil chemical properties is also negatively correlated. The low content of N-total and CEC of the soil resulted in the low SOC of the soil in the study area.