DIY Fertilizer Using Bananas
Banana peels have a lot of potassium and small amounts of nitrogen, phosphorus and magnesium. This is what makes them such a great slow release natural houseplant fertilizer.
All you have to do is take your banana peels and let them soak in water for a couple of days. Next, take your banana peels out of the water and compost them, then water your plants with the banana-soaked water. It can be used on your indoor or outdoor plants.
Another way to use bananas as fertilizer is to either lay strips of the banana peel onto the soil, or cut the peel into bits and mix it in with the soil.
When the banana peels decompose, it releases the nutrients into the soil, making your houseplants healthy.