Maximum Yield USA 2012 September | Page 68

recipes for success People choose do-it-yourself projects for many reasons. Some like the satisfaction of completing a task on their own, while others like the idea of having absolute control over their materials, methods and finished product. Another reason people choose do-it-yourself projects is price. Generally speaking, providing your own labor will produce a product for a much lower price than hiring out the work would. Building your own organic potting soil is no different than any other do-it-yourself project. It allows the gardener to save money while maintaining control over every aspect of the soil building process. Some might also argue that it produces a superior product. However, before we dive into soil recipes, let’s first examine some of the more common ingredients used in potting soils. There is no shortage of organic soil amendments to choose from. Once an understanding of the physical properties and nutrient value of each ingredient is reached it then becomes possible to customize soil mixtures not only for particular crops, but also for specific periods in a plant’s life cycle (blooming or flowering periods). Base ingredients The base ingredients of a soil are the substances that make up the bulk of the soil itself. These are the ingredients that are most responsible for the soil’s physical properties and texture. Some of these also make up the backbone of the nutrient content. Sphagnum peat moss Sphagnum peat moss has been a popular soil additive since the inception of potting soils. The physical properties of peat moss allow for high moisture retention, as well as high oxygen content. This combination of water and oxygen retention makes a great environment for developing roots and is the main reason peat moss is the most popular ingredient in premade potting soils. It is not uncommon for peat moss to make up 30 to 60% of a premade soil mixture. 66 Maximum Yield USA | September 2012