How to use banana peel as fertilizer?

Dry banana peels in sun for 2–3 days and powder them in a mixer. Work 1–2 tablespoons into the top soil layer monthly. Alternatively soak 3–4 peels in 1 litre of water for 48 hours and apply the liquid directly to roots. Potassium from peels improves flower set, fruit quality, and disease resistance.