Banana peels are rich in potassium and phosphorus which are key nutrients for the healthy bud and fruit formation in tomatoes. You can either add it to your compost or make a banana peel tea for your tomatoes. Here’s how to make a banana peel spray: Materials: 1. Spray bottle 2. 3 liters of water 3. Banana peels 4. Cloth 5. Rubber bands 6. Large container Procedure: 1. Cut the banana peels and place them in a large container. 2. Add the water and mix. 3. Cover the container with a cloth and seal it with a rubber band. 4. Let it sit for 3 to 5 days. 5. Transfer the banana peel tea to a spray bottle and apply it to your tomatoes.