The 4 part nutrient is complete in itself that make any leafy plant (like lettuce, spinach, Basil, kale Or Coriander ) healthy. You can use it in HYDROPONIC SYSTEMS, OR COCOPEAT FARMING. It comes with an instructions paper that makes it easier for you to use the 4 part nutrients. The instructions provide a detailed information about how to mix nutrient. You don’t need to purchase any additional nutrients for your leafy plant.