Yellow grass is a common problem for homeowners in Central Florida due to the region’s unique climate, sandy soils, and intense sun exposure. Fortunately, you can restore your lawn to a lush green state properly. Here’s how to identify the cause and fix yellow grass effectively.

1. Identify the Cause of Yellowing
Grass turns yellow for several reasons, including nutrient deficiencies, overwatering or underwatering, pests, fungal infections, or poor soil quality. In Central Florida, sandy soils often leach nutrients quickly, leading to deficiencies, especially nitrogen and iron.
Check for signs:
Pale yellow overall: Likely a nitrogen deficiency.
Yellowing with green veins: Possibly an iron deficiency.
Circular yellow patches May indicate fungal disease.
Irregular yellow spots with thinning: Check for chinch bugs or mole crickets.

2. Adjust Watering Practices
Central Florida lawns, especially St. Augustinegrass and Zoysiagrass, need about 1 inch of water per week, including rainfall. Overwatering can cause root rot and fungal issues, while underwatering stresses the grass and causes yellowing.
Water early in the morning (between 4–8 a.m.).
Use a rain gauge or a tuna can to measure water output.
If it rains more than 1 inch per week, skip watering.

3. Fertilize Appropriately
Sandy Florida soil cannot retain nutrients, so routine fertilization is essential. Use a slow-release fertilizer suitable for your grass type. In Central Florida:
Apply fertilizer 2–4 times per year (spring through fall).
Choose a nitrogen-rich fertilizer with added iron for chlorosis.
Avoid over-fertilizing, especially in the summer, which can burn grass and promote weed growth.
A good choice is a fertilizer labeled 16-4-8 or similar, which contains iron (Fe) to help deepen the green color.

4. Check for Pests and Diseases
Common Central Florida lawn pests include chinch bugs, armyworms, and grubs. These can cause yellow or brown patches.
Inspect affected areas for signs of insect activity.
Use an appropriate insecticide if needed, or consult with a local extension office.
Fungal infections like brown patches or dollar spots can also turn grass yellow.
Improve drainage and reduce watering if you suspect fungi.
Use a fungicide if necessary, but only after identifying the specific disease.

5. Improve Soil Health
Aeration and top-dressing can significantly improve lawn health.
Aerate in spring or early summer to give roots better air access and nutrients.
Top-dress with a thin layer of compost or organic matter to improve sandy soil’s nutrient retention.

6. Mow Properly
Mowing too low stresses grass, especially in hot climates. Follow these guidelines:
St. Augustine grass: mow at 3.5–4 inches.
Zoysiagrass: mow at 2–2.5 inches.
Sharpen your mower blades regularly to avoid tearing the grass, which can lead to disease and yellowing.

Turning yellow grass green in Central Florida requires a balanced approach to watering, fertilization, pest management, and soil care. Your lawn can thrive in the Sunshine State’s challenging conditions with consistent attention and region-specific practices.

If problems persist, reach out to us at ELT Landscape.