Raking will be your first task of spring lawn care. Okay, I can hear the groans coming from all lands near and far, wherever grassy carpets are cultivated: "But we already raked leaves in the fall!" Sorry, but raking is for more than just removing leaves: it's for controlling thatch, too. A thatch build-up of more than 1/2 inch is considered excessive.
Thatch is the reason why I recommend that, when you rake leaves in the fall, you make the effort to rake deeply. Don't just skim the surface, so as to remove the leaves. A deep raking will remove thatch, too, allowing you to kill two birds with one stone. Even if you followed this advice in fall, I still recommend a spring raking: it will remove grass blades that died over the winter -- dead blades that are just waiting to become thatch!
But there's often another good reason for a spring raking. As you survey your lawn in spring, see if there are any matted patches, in which the grass blades are all stuck together. This can be caused by a disease known as "snow mold." New grass may have difficulty penetrating these matted patches. But a light raking will be sufficient to solve this problem.
Just when you should perform any of these spring lawn care tasks will depend upon the climate of your own region. But Mother Nature provides palpable cues in some cases. For instance, when you're pretty sure the snow season (if you have one) is over in your region, begin raking. Applying pre-emergent herbicides (see Tip #6) should be done sometime between the time the local forsythia bushes stop blooming and the time the local lilac bushes begin blooming.