Reusing Pistachio Shells: How to Turn Them Into Powder and Use It in Your Garden

✅ How to Clean:

Collect all shells and rinse them under warm water.

Soak them in a bowl of hot water for 20–30 minutes.

Rinse again thoroughly.

Spread them out on a towel and let them dry completely — preferably under the sun for 1–2 days.