Putting banana peels in a bottle; a trick

Putting the lid on the bottle: Put the cap on the bottle, but be sure it is not completely closed. Because of this, the gasses that are created during fermentation are able to escape.
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.