Annual ryegrass is a temporary grass used in lawns or as a ground cover. The seeds of annual ryegrass grow so quickly that you can see results in as little as four to five days. If you are using ryegrass in your yard, you will need to know how to maintain it. Part of your maintenance routine should include fertilization. This will keep the ryegrass looking healthy for as long as you need to use it.
Choose a fertilizer that is high in nitrogen. According to University of California, Davis, the most important nutrient in the maintenance of ryegrass is nitrogen. A 20-5-10 fertilizer is a good fertilizer for ryegrass.
Mix the fertilizer with water at the rate specified on the product label. Not following the product label could give you fertilizer that is not strong enough, or fertilizer that will damage your grass.
Apply the fertilizer to your grass. The University of Missouri recommends you apply the fertilizer at a rate of 5 lbs. for every 1,000 square feet of lawn.
Apply the fertilizer in September, November and May.