In addition towater and sunlight, fertilizers are very important to plants. If you have good well-loamed soil, you can easily do without them, however, if the soil has suffered exhaustion from seasons of planting and harvesting you will need alternate compost. It is imperative that you choose your fertilizer wisely for the particular plants, in order to satisfy their nutritional requirements, and achieve optimum yield and growth. Normally, you will different kinds of fertilizers, and each one has a specific use. You will need to use at least two types in a garden for planting and topdressing. You must also understand the composition, which normally contains three major ingredients, which are nitrogen (N), phosphate (P), and potash (K). A good product will have a good balance of all the ingredients or have one ingredient in larger quantity depending on the usage. For instance, if you want a lawn to grow fast, use one that has more nitrogen.