What are the uses of potash ? Potash has a wide range of uses across various industries. The primary use of potash is in the agricultural industry, where it is used as a fertilizer to promote plant growth and improve crop yields. Potash contains high levels of potassium, a nutrient essential for plant health and development. It helps in: 1. Fertilizer Production: Potash is used to create fertilizers that provide plants with the necessary potassium for growth, root strength, and disease resistanc