To allow it to ferment, put the bottle in a dark location and let it to ferment for a number of days. As a result of this process, the shells will break down, which will result in the release of nutrients into the water.
After a few days have passed, the liquid should be filtered in order to separate the peels from the liquid. The liquid that will be produced is a liquid fertilizer that is rich in nutrients.
Utilize the fertilizer: Before applying the fertilizer to your plants, you may dissolve it in water to make it more water-soluble. There are some plants, like tomatoes and peppers, that need a high potassium content, and this liquid is very good for such plants.