Expert Gardener Lawn Fertilizer Plus 2% Iron 42 lb., is a general-purpose lawn food for any type grass. It is a high analysis fertilizer containing slow-release nitrogen to give your lawn a vigorous green color. It is a safe formulation that will not burn your lawn when used as directed, yet it is long-lasting and will gradually continue to feed your lawn for as long as 3 months. Since it has a high nitrogen content, it goes much further than conventional fertilizers. You may apply anytime during your lawns active growing season and always ensure to apply evenly over dry grass. For best results water the product thoroughly with either rainfall or irrigation after application.