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 or more times a year will make it even healthier. If you put your lawn on the regular feeding schedule it will look lush and green, and your neighbors will turn green with envy.
For maximum appearance, fertilize your lawn about once every six to eight weeks during their active-growth period. Simply break up the yearly requirement of nitrogen into the appropriate number of applications, say one or two in spring and two or three in fall for cool-season grasses, three over the summer for warm-season grasses.
If you’re not up for the higher-maintenance lawn (that is, frequent mowing), fertilizing once in spring and once in fall for cool-season grasses, and once in early summer and once in late summer for warm-season grasses, gives you a pretty nice lawn.