Our first application consists of a pre-emergent herbicide to prevent annual weeds such as crabgrass and spurge. Crabgrass germinates when soil temperatures reach over 60 degrees F (from April 15-May 10). We apply the pre-emergent before crabgrass germinates, but not too early that it may become ineffective for spurge (germinates May-June). Along the Wasatch Front, February applications are ineffective. Most lawns are still in dormancy and will not absorb most of the nutrients. For early spring green-up, the late fall application is best. Moore Green strives to give the most value for your dollar on all of our applications. Unfortunately, companies do exist that try to fit in as many applications as possible, hoping to get more money for their service.