St Augustine Grass Fertilizer

Discover the best St Augustine grass fertilizers to promote green, thick growth. Learn when to apply pre-emergents and nitrogen, plus get a full fertilization schedule to keep your lawn thriving all year long.

St. Augustine grass is known for its lush, thick appearance and ability to thrive in warm climates. To keep your lawn healthy and green, using the right St Augustine fertilizer is essential. With the proper nutrient balance, you can help your grass withstand stress, fight off weeds, and grow vigorously throughout the year.

What St Augustine Grass Needs to Thrive

St. Augustine grass requires a combination of nutrients, with a strong focus on nitrogen to support thick, green growth. A balance of nutrients, including potassium, is also important for drought tolerance and disease resistance. Regular fertilization, combined with timely weed control, ensures your lawn looks its best year-round.

When to Apply Pre-Emergents and Nitrogen

For St. Augustine grass, the key to controlling weeds is applying pre-emergents early in the year. Products like 13-0-10 Guardian Pre-emergent are perfect for preventing weeds like crabgrass from germinating. Pre-emergents should be applied in January and again in March before weeds have a chance to take hold.
As temperatures warm up, it's time to push St. Augustine grass with nitrogen. Begin applying a nitrogen-rich fertilizer, like 20-0-10 Almighty, in May to promote strong growth throughout the growing season.

St Augustine Grass Fertilizer Schedule

Following a consistent fertilization schedule is crucial for St. Augustine grass to thrive. Here's a recommended schedule to ensure your lawn gets the nutrients it needs throughout the year:

  • Jan 15: Apply 13-0-10 Guardian Pre-emergent to prevent weeds before they germinate.
  • March 15: Reapply 13-0-10 Guardian Pre-emergent for extended weed control.
  • May 1: Apply 20-0-10 Almighty to provide a boost of nitrogen for early growth.
  • June 15: Continue with 20-0-10 Almighty or switch to 0-0-4 Nutrigreen if you are located in a Blackout area. 
  • August 1: Apply another round of 20-0-10 Almighty or 0-0-4 Nutrigreen to keep your lawn strong and dark green through the heat.
  • Sep 15: Apply 13-0-10 Guardian Pre-emergent for fall weed prevention.
  • Oct 15: Use 10-0-20 Emerald or 0-0-4 to support root development as the cooler months approach.
  • Dec 1: In South Florida, apply 10-0-20 Emerald or 20-0-10 Almighty to maintain your lawn’s health through the winter.

Choosing the Best St Augustine Fertilizer

The best fertilizer for St. Augustine grass is one that delivers a steady supply of nitrogen for consistent growth, while also supporting drought resistance and disease tolerance. Our products, such as 20-0-10 Almighty and 10-0-20 Emerald, contain the right nutrient mix to promote both top growth and strong roots.

Best Liquid Fertilizer for St Augustine Grass

If you're looking for the best liquid fertilizer for St Augustine grass, consider using a product that delivers quick results. Liquid fertilizers offer fast absorption, providing nutrients directly to the roots. They are ideal for periods of stress, like drought, or when you want an immediate green-up.

Frequently Asked Questions

What is the best fertilizer for St. Augustine grass?

St. Augustine thrives with a combination of specialized fertilizer blends at different times of the year. Fertilizers high in nitrogen and potassium will strengthen St. Augustine grass, provide deep green color, and maintain a healthy lawn.

When should I fertilize my St. Augustine grass?

Fertilize St. Augustine grass throughout the growing season, starting in the spring when temperatures warm up. Begin with a pre-emergent fertilizer in January and March to prevent weeds, followed by nitrogen-rich fertilizers like 20-0-10 Almighty in May, June, and August. Switch to a potassium-rich fertilizer like 10-0-20 Emerald in the fall to support root development.

How often should I fertilize St. Augustine grass?

St. Augustine grass should be fertilized every 6-8 weeks during the growing season. This typically means applying fertilizer from early spring through late fall. Following a consistent fertilization schedule helps your grass grow thick, green, and healthy while preventing weed and disease problems.

What type of fertilizer is best for St. Augustine grass in summer?

In the summer, St. Augustine grass needs a high-nitrogen fertilizer like 20-0-10 Almighty to support vigorous growth. As temperatures rise, applying nitrogen ensures the grass remains lush and green. If the lawn shows signs of stress, a fertilizer with added potassium, such as 0-0-4 Nutrigreen , can help strengthen the grass and keep it dark green during a nitrogen blackout period.

Can I use liquid fertilizer on St. Augustine grass?

Yes, liquid fertilizers are an excellent option for St. Augustine grass, especially when you need a fast green-up or when the lawn is under stress from drought or heat. Liquid fertilizers are absorbed quickly, allowing the nutrients to work immediately.

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