A properly fertilized lawn has good density and deep color. Fertilizing not only strengthens the plant, it also protects your lawn from drought, disease, and weeds. Fertilizer is composed of varying ratios of nitrogen, phosphorous, and potassium. This is known as the N-P-K analysis. Our Arizona soil has very healthy levels of potassium and although you can include it in your fertilizing regimen it is not required for a vigorous growth strategy.
Newly Installed sod should be fertilized immediately after installation, preferably with something similar to a 16-20-0 analysis (16% nitrogen, 20% phosphorus, and 0% potassium). The high nitrogen content allows for an increased growth regimen while the phosphorus gives encourages good root development.
Because of the increased daylight hours during the summer growing season an application of something similar to 21-0-0 analysis (21% nitrogen, 0% phosphorus, 0% potassium) once a month works great. Nitrogen is the only necessary ingredient for the long summer months because the blades of turf absorb a substantial amount of sunlight that helps your lawn maintain its deep green color.
For the winter months it is best to use a 16-20-0 analysis (16% nitrogen, 20% phosphorus, 0% potassium) or something similar. The shorter daylight hours mean the turf needs a nutrient source, namely phosphorus, to replenish its chlorophyll reserves. We recommend an application every 4 to 6 weeks for a healthy winter lawn.
These are the ideal analyses for your lawn; however, fertilizers with a similar ratio will also strengthen your turf and deepen its color. For questions or concerns about your lawn call our lawn professionals.