When to Feed Your Lawn The most important thing you can do for your lawn is to feed it. A well-fed lawn is healthier, which means it has a better root system to combat heat, cold, drought, mowing, foot traffic and other stresses. While feeding your lawn once a year will improve its condition, feeding it four times a year will make it even healthier. If you put your lawn on the regular feeding schedule outlined below, it will look lush and green, and your neighbors will turn green with...