Liquid organic fertilizers like compost, compost tea, and vermicompost tea can improve soil quality and the growth, yield, and quality of onion plants. A mix of 50% compost, 25% compost tea, and 25% vermicompost tea had the best results for plant height, weight, and bulb yield. The soil pH decreased while organic matter and nutrients like N, P, and K increased with these fertilizers. Using a combination of compost tea and vermicompost tea can lead to higher onion productivity and better soil properties.