The nutrients in the soil that feed your lawn become drained throughout the growing season. Each time a lawn is mowed, the nutrient level is reduced. In order to keep the grass thick and healthy, you must replace these nutrients on a well timed schedule. Here is what feeds your lawn:
Nitrogen keeps grass green and stimulates leaf growth. This food is depleted the soonest and should be applied both in the Spring and Summer.
Phosohates build up the root system. It should be applied once a year in the Spring or Fall.
Potash hardens the grass, making it less susceptible to disease. They should be applied in either the Spring or Fall.
Watch the weather report before you feed your lawn. Try to fertilize right before a rainfall. The grass should be dry and the soil moist. Don’t feed the lawn when it’s raining. If it doesn’t rain, use a sprinkler to water thoroughly.
Credit: Renovate Your World