Hull Farm Cocoa Bean Shell MulchWhat are the benefits of Cocoa Shell Mulch? Deep brown color resembles soil and will not fade out. Reduces water loss and aids in water retention. Natural plant insulator: helps plants stay warm on chilly days and cool on hot ones. Naturally suppresses weed growth as it binds from decay. Brings in good critters such as earthworms and other beneficial insects to help to aerate soil. Slow, natural decomposition adds vital nutrients to the soil. N P K