Abstract This study aims to determine the appropriate combination of Ecoenzyme administration in reducing urea use in the cultivation of samhongking mustard plants. This study was designed using a Randomized Block Design (RAK) involving 6 treatments with 4 replications, resulting in a total of 24 experimental units. The treatments tested were the administration of ecoenzyme combined with the administration of inorganic fertilizers: E0: Ecoenzyme Dose 0% + Urea Dose 0%; E1: Ecoenzyme Dose 100%; E2: Ecoenzyme Dose 50% + Urea Dose 50%; E3: Ecoenzyme Dose 75% + Urea Dose 50%; E4: Ecoenzyme Dose 25% + Urea Dose 50%; E5: Urea Dose 100%. The research data were analyzed using Analysis of Variance (ANOVA). If a significant effect is found, the analysis will be continued with the Honestly Significant Difference Test (HSD) at a significance level of 5%. The results of the study showed that the combination of 75% ecoenzyme + 50% urea application treatments provided growth and yield results that were close to the value of 100% urea application treatment, with 75% ecoenzyme application being able to reduce urea use by 50% with a yield of 562.93 g plant-1. Keywords: Ecoenzyme, Samhong King mustard greens, Urea
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