<![CDATA[Arugula is a vegetable plant similar to mustard greens that originates from the Mediterranean. Although not yet widely known in Indonesia, this plant offers numerous benefits and has significant economic potential. The nutritional value and health benefits of arugula are further enhanced when cultivated using organic farming principles. Coffee grounds, as organic waste, can be utilized as an additive in growing media to support plant growth. Liquid organic fertilizer, as a nutrient, is also important in the plant growth process. This study aims to identify the effects of coffee grounds application and liquid organic fertilizer concentration on the growth and yield of arugula plants. A factorial Randomized Complete Block Design design was used because the research was conducted on land with heterogeneous environmental conditions. The first factor was the application of coffee grounds at three levels: 0 g/polybag, 40 g/polybag, and 80 g/polybag. The second factor was liquid organic fertilizer concentration at 0 ml/L, 2 ml/L, 4 ml/L, and 6 ml/L, resulting in 12 treatment combinations. Each treatment combination was repeated three times with three samples per repetition, resulting in a total of 108 observation units. The data obtained were analyzed using ANOVA at a 5% significance level, and if significant differences were found, the Tukey test was conducted. The parameters observed were plant height, number of leaves, leaf length and width, root length, fresh weight, shoot weight, dry weight, and harvest index. The results showed that liquid organic fertilizer treatment at all levels did not have a significant effect on any parameters, including growth and yield parameters. Coffee waste treatment at the K0 level had a significant effect on all parameters.]]>
