What Is an Effective Fertilizer for St. Augustine Grass?

What Is an Effective Fertilizer for St. Augustine Grass?

An effective fertilizer for St. Augustine grass is two to four pounds of nitrogen per 1,000 feet of lawn a year, according to Clemson University's Cooperative Extension. The fertilizer should first be applied in the spring, after the last frost. A nitrogen-phosphorus-potassium fertilizer with a 4-1-2 ratio is sufficient.

To fine-tune the fertilizer needs of the lawn, the soil should be tested. It may need amendments such as lime or other nutrients.

Nitrogen fertilizers can be quick- or slow-release, according to SFGate. Lawns respond to quick-release fertilizers in as little as a week, while it can take 10 weeks to see results with a slow-release fertilizer. It doesn't matter if the fertilizer is organic or inorganic.