How to Make Liquid Compost From Watermelon Rinds in Just 3 Days

15 July 2025

Is your dessert these days a bowl of refreshing watermelon? Great choice.

But once you’re done eating the pulp, don’t discard the rinds just yet — gardeners believe it makes excellent compost!

Anupama Desai, an urban gardener from Surat, finds value in using rinds of fruits to prepare compost for plants. What’s more is that the technique is simple, and all you need is water.

“Watermelon rinds contain potassium, phosphorus, calcium, carbohydrates, and many other micronutrients. Compost prepared from its rinds acts as a very good fertiliser,” she says.

Here, she shares a step-by-step guide to preparing compost from leftover watermelon rinds:

How to Make Liquid Fertiliser Using Watermelon Rinds 1. Chop the rinds into small pieces. This speeds up decomposition and saves composting time.

2. Transfer the pieces to a plastic bucket. Fill the bucket with water — twice the quantity of the rinds. Regular tap water works fine.

3. Cover the bucket and keep it in the shade, away from direct sunlight. 4. Stir the mixture once a day. 5. In 3 days, your liquid fertiliser will be ready.

6. Strain the mixture. You can use the water directly on plants, or dilute it with regular water in a 1:1 ratio.

7. Give this fertiliser to the  plants either in the morning or after sunset for best results.