Onion peels have a good amount of plant nutrients like nitrogen, phosphorus, potassium, calcium, iron, #magnesium and #copper. Soak three handfuls of onion peels in one litre of water and leave the solution for 24 hours. After 24 hours, you will see the solution will turn onion pink. Strain it well with the help of sieve to obtain the maximum extract.
Your #homemade #fertilizer is ready, drench it at the base of the plant and repeat it after 15 days interval. Use 50ml dose for small plants but you can use 100ml dose for the bigger plants.