Lawns should be fertilized at least twice a year. We usually suggest our clients have it done in the spring, when their lawn is aerated and then once again in late fall.
Aside from making your lawn look like a troop of geese have taken up residence for a brief time, aeration, or core cultivation, allows the soil to breathe by reducing compaction. This helps the fertilizer treat the roots of the grass and promotes an overall healthier lawn. It is also used to prevent thatch buildup.