Fertilizing St. Augustine Grass in the Fall: A 5-Step Guide

Keeping your St. Augustine grass healthy and lush during the fall requires proper fertilization. Follow these 5 steps for optimal results:

Step 1: Soil Test (Optional)

A soil test can determine your lawn's nutrient levels and help you choose the right fertilizer (Figure 1).

Figure 1: Estimated Cost of Soil Test

Step 2: Choose the Right Fertilizer

Select a fertilizer with a nutrient ratio of 3-1-2 (nitrogen-phosphorus-potassium). Look for fertilizers labeled as "fall" or "winterizer" (Table 1).

Table 1: Recommended Fertilizers for St. Augustine Grass in the Fall

Step 3: Apply Fertilizer

Spread the fertilizer over the lawn evenly using a broadcast spreader. Apply at the rate recommended on the package (Table 2).

Table 2: Fertilizer Application Rates for St. Augustine Grass in the Fall

Step 4: Water the Lawn

Water the lawn deeply after applying fertilizer to dissolve and distribute the nutrients.

Step 5: Mow the Lawn

Mow the lawn at the recommended height (1.5-2.5 inches) to encourage healthy growth.

Common Mistakes to Avoid

• Overfertilizing: Excessive fertilization can burn your lawn. Stick to the recommended application rates.
• Using the Wrong Fertilizer: Use a fertilizer specifically formulated for fall application.
• Applying Fertilizer too Early: Wait until the lawn has stopped growing actively, typically mid-October to mid-November.

FAQs

1. Why is fall fertilization important? Fall fertilization provides nutrients to strengthen the grass roots and prepare it for winter stress.
2. How often should I fertilize St. Augustine grass? Fertilize St. Augustine grass 3-4 times per year, including a fall application.
3. What other lawn care practices support healthy fall growth? Aeration, dethatching, and proper mowing can enhance lawn health.
4. How much does it cost to fertilize St. Augustine grass? Fertilizing St. Augustine grass in the fall typically costs between $25 and $50 per 5,000 square feet.
5. Can I use granular or liquid fertilizer for fall fertilization? Both granular and liquid fertilizers are effective for fall application.
6. What is the best time of day to fertilize St. Augustine grass? Fertilize early in the morning or late in the evening to avoid heat stress.

By following these tips, you can provide your St. Augustine grass with the nutrients it needs to stay healthy and lush throughout the fall and into the winter.