Leek is one of the most widely cultivated vegetable crops due to its short growing period andnhigh selling value. The decline in soil quality due to the massive use of chemical fertilizers in conventional agriculture is one of the causes of the decline in leek crop production. One of the steps taken to reduce the use of chemical fertilizers as a supply of nutrients is by applying moringa leaf liquid organic fertilizer (POC). This study used a one-factor Completely Randomized Design (CRD) with 4 treatments namely K0 (control), K1 (POC 90 ml), K2 (POC 120 ml), K3 (POC 150 ml) which were repeated 5 times. The results showed that all treatments did not give a significantly different effect on the growth and yield of leek plants. The nutrient content in Moringa POC is thought to be too low and needs to be combined with other nutrient enrichment materials.