Let's start by dispelling a crucial myth about compost: compost is not smelly! Truly, if you are properly tending your pile, you should have nothing but a deep, rich earthy smell wafting off of your compost. Besides having a pleasant smell, compost is one of the most valuable additions to any garden. With its high nutrient density, it helps alter the natural structure of your garden soil and convert it into something that friable and fertile.