font-family: Arial, Helvetica, sans-serif} Introduction Grass and Soil Basics When and How to Fertilize Mowing and Watering Controlling Weeds and Insects Changing from a Chemical Lawn to an Organic One Resources Send this to a friend Printable Version The Natural Lawn How to Grow Turf Without Chemicals When and How to Fertilize There are two different fertilizing schedules for American lawns one for cool-climate grasses and the other for warm-climate grasses.