Organic fertilizers come from living things.
Fertilizing need not be associated with expensive, synthetic muck. Natural fertilizers literally surround us and we can make use of them. Organic soil mixes are also available at most retail garden centers; the advantage being that the work is already done for you.
You can also cultivate your own soil year after year, composting and fertilizing with abundant materials from your kitchen, last year's garden, and organic lawn waste.
Let's look at common organic fertilizers and suggestions for using them.