Easily make your own fertilizer from orange peels. Oranges are delicious and healthy because they contain vitamins A and C as well as essential oils.
Orange peels contain nitrogen, which is important for plant growth. The essential oils have an antibacterial effect and act as a natural fungicide. It is important to note that, similar to a fertilizer made from coffee, you only use oranges on plants that also benefit from an acidic soil environment. Of course you can also use tangerine peels, which are completely natural and cheap.