Apply sparingly since fertilizers contain salts also. Sand or other inert material can be a good alternative. Collect and use kitchen scraps. Swap gardening stories and information. Study insects, birds, plants diseases, and gardening techniques.
Successful gardening requires constant learning.
Use the benefit of another gardener's experience and utilize books, magazines, and Cooperative Extension Service newsletters and publications. Keep track of what you're buying in the store and see how you could replace it with homegrown produce. Cost, freshness, and quality are areas of concern for all consumers. Look into resources at the Extension Service and library. This may include not only written sources of information but gardening classes and workshops that cover all aspects of gardening from a local perspective.