By Anita Gall, University of Nebraska Master Gardener
Fall fertilization of your lawn is probably the most important application that you can make. As temperatures cool the lawn starts to pull its energy into its root system. Applying a formulation of fertilizer with a lower nitrogen and higher phosphorus from mid-September to mid-October helps stimulate root growth regenerating roots lost by the hot, dry summer weather. Mid-September is also a good time to spray the weeds in your lawn.