Natural Organic Mustard Cake. Mustard cake is the residue left over from commercial mustard oil or meal production. Mustard cake is widely used as a fertilizer for flowering and vegetable plants. Mustard oil cake fertilizer is very rich in protein. It provides many micro nutrients to your garden plants. It also prevents many diseases and make your garden plants very healthy. You can use the mustard oil cake fertilizer for flowering plants, vegetable plants. Please do not use the product for food purposes. The product is being supplied only for gardening purposes. Quality of the product is guaranteed and being natural it is completely environment friendly. Safe for kids and pets to play around plants after the application. It can be used to make liquid fertilizer and as powder. Its compositions will nurture plants naturally