In the fertilizer industry, the term organic is used to refer to any product containing carbon in its chemical structure. This means that man-made forms such as ureaformaldehyde are called organic along with "natural" fertilizers such as composted manure.

While both kinds of materials supply slow-release nitrogen to your grass, natural, or nonsynthetic, fertilizers do more than just add nutrients to the soil.

They improve the overall condition of the soil and increase the number of beneficial microorganisms residing in it.

Unfortunately, natural fertilizers would need to be spread in large quantities to meet lawn fertilization requirements. So, the best strategy is to use natural fertilizers to supplement a yearly dose of synthetic fertilizer.

Courtesy Yardcare.com