Early September is a good time to fertilize your clients’ lawns. Fertilizing is an important component of lawn care, as it improves the color and vigor of grass.
Nitrogen is the nutrient required the most, although too much nitrogen can cause excessive top growth and other problems. In most cases, a rate of 1 pound of nitrogen per 1,000 square feet of lawn is adequate.
If your fertilizer contains a high percentage of nitrogen, you will need to adjust the quantity used to a lesser amount than if lower percentage nitrogen fertilizers are used.
Source: Chicago Sun-Times