Mung beans were classified as drought-tolerant crops. An appropriate irrigation is essential for optimal mung bean growth. There has been a drop in mung bean prductivity in Indonesia, caused by soil fertility loss and changing climate conditions. The aim of the study was to obtain the best combination of watering frequency and organic fertilizer treatment on the growth and yield of mung beans. The research location was at the Experimental Laboratory of the Faculty of Agriculture, Sebelas Maret University Surakarta in Jumantono, Karanganyar, Central Java. Soil analysis was conducted at the Yogyakarta Agricultural Instrument Standardization Agency Laboratory. Drying and yield calculations were conducted at the Ecology, Management, and Crop Production Laboratory of Sebelas Maret University, Surakarta. The research was conducted for 5 months in September 2024 - February 2025. The method used was a two-factor and 8-level Randomized Completely Block Design (RCBD) with factorial design treatment and three replications. The first factor was the frequency of watering once every a day, two days, three days and four days from field capacity. The second factor was organic fertilizer dose (0, 10, 20, and 30 tons/ ha). The parameters observed were height, number of leaves, number of nodia, leaf area, fresh weight, dry weight, number of pods, number of seeds per pod, number of seeds per plant, 100 seed weight, and seed weight per plant. The data were analyzed using ANOVA (Analyses of Variance) at 95% significance level, and when significant differences were found, further analysis was carried out using the DMRT (Duncan Multiple Random Test) at a 95% significance level. The results showed that the combination of watering once every 3 days and a fertilizer dose of 10 tons/ha increased leaf area compared to other treatments. The frequency of watering every 3 days was able to increase mung bean yield compared to every 4 days. A dose of organic fertilizer of 10 tons/ha increased the growth and yield of mung beans compared to the control treatment.