Maintaining a healthy and vibrant St Augustine lawn requires the right fertilizer tailored for its unique nutrient needs. Below is a comparison table summarizing the top fertilizers curated specifically for St Augustine grass to help you select the best option for your lawn care routine.
| Product Name | Brand | Key Features |
|---|---|---|
| SeedRanch St. Augustine Lawn 24-2-11 Fertilizer – 50 Lbs. | Lesco | Includes 6% Iron, 12,000 Sq.ft coverage, Nutrients tailored for St Augustine |
| Sunniland Weed & Feed 20-0-6 Lawn Fertilizer 5000 sq. ft. | Generic | Easy granules, 2 seasonal applications, Suitable for all St Augustine types |
| Advanced 16-4-8 Balanced NPK Lawn Food – 32 Ounces | Simple Lawn Solutions | Complete NPK blend, Seaweed & Fish nutrients, Liquid spray for easy application |
| Scotts Green Max Lawn Food with Iron – 16.67 lbs. | Scotts | Iron supplement for greening, Feeds and greens in 3 days, For all grass types |
| 10-0-20 Emerald Lawn Fertilizer – 18 lbs. | Lawn Synergy | Slow-release nitrogen, Iron and micronutrients, Potassium-rich for stress protection |
SeedRanch St. Augustine Lawn 24-2-11 Fertilizer
This SeedRanch fertilizer by Lesco is specifically formulated for St Augustine turf with a nutrient ratio of 24-2-11, delivering an excellent balance of nitrogen, phosphorus, and potassium critical for vibrant lawn health. It contains 6% iron, which provides exceptional greening results by enhancing chlorophyll production. The product covers up to 12,000 square feet, making it effective for large lawns. Its formulation ensures your St Augustine grass receives essential nutrients to maintain lush color and robust growth throughout the growing season.
Sunniland Weed & Feed 20-0-6 Fertilizer for St. Augustine
The Sunniland Weed & Feed fertilizer offers convenience with its easy-to-spread granules specially designed for St Augustine lawns. Its 20-0-6 nutrient formula supports strong lawn growth while helping control weeds. Intended for two applications in spring and fall, it fits well into seasonal lawn care schedules. This product is versatile, compatible with all types of St Augustine grass, maintaining turf health through nutrient supplementation and weed management.
Advanced 16-4-8 Balanced NPK Liquid Lawn Fertilizer
This liquid fertilizer from Simple Lawn Solutions provides a balanced blend of NPK (16-4-8) enhanced with seaweed and fish extracts. It’s designed for quick absorption and easy application via sprayer, allowing precise feeding of St Augustine and other grass types. The formula delivers essential macronutrients that promote greener grass and healthy growth during spring and summer. Its liquid form ensures nutrients penetrate quickly for improved turf health and vigor while limiting nutrient runoff.
Scotts Green Max Lawn Food with Iron Supplement
Scotts Green Max combines fertilizer with iron minerals, offering a dual-action solution to nourish and deeply green your St Augustine lawn. Containing 5% iron, it accelerates the greening process with visible results within three days. Applicable during spring, summer, or fall, this fertilizer supports overall lawn health and robust color. It’s formulated for use on all turfgrass varieties, ensuring versatile application for various lawn types.
10-0-20 Emerald Lawn Fertilizer with Slow-Release Nitrogen
The Lawn Synergy Emerald Fertilizer features a slow-release nitrogen formula (45% AccuBlu) with a nutrient ratio of 10-0-20, emphasizing potassium for drought tolerance and root strength. It incorporates iron and Nutrace micronutrients to promote a deep green color without excessive top growth. This fertilizer is ideal for St Augustine, tall fescue, zoysia, and centipede grasses, providing up to 8 weeks of steady feeding. Its potassium content also enhances the lawn’s resistance to stress and disease.
Buying Guide for Choosing the Best Fertilizer for St Augustine Grass
Selecting the right fertilizer for St Augustine grass ensures healthy growth, disease resistance, and vibrant color. Here are key factors to consider:
Nutrient Ratio (N-P-K)
St Augustine thrives with balanced nitrogen levels for lush green growth, moderate phosphorus for root development, and potassium for drought tolerance and disease resistance. Products with NPK ratios like 24-2-11 or 16-4-8 are tailored for this grass type. Higher nitrogen promotes quick greening, while potassium strengthens turf health.
Iron Content
Iron is vital for maintaining deep green color without promoting excessive growth. Fertilizers enriched with iron deliver rapid greening effects and improve chlorophyll production, especially critical for St Augustine lawns.
Application Form and Schedule
Granular fertilizers offer longer feeding duration and ease of application for large areas, while liquid fertilizers provide quicker nutrient absorption and precise control. Consider seasonal requirements—some fertilizers are best applied during spring and fall, others throughout the growing season.
Slow-Release vs Quick-Release Nitrogen
Slow-release nitrogen provides steady feeding over weeks, reducing nutrient runoff and surge growth. Quick-release formulas green the lawn rapidly but may require more frequent applications. Combining both types can balance growth and maintenance.
Weed Control Inclusion
Some lawn fertilizers include weed control agents, which can simplify lawn maintenance but require careful timing to avoid damaging the grass. Choose weed and feed products if managing common weeds alongside fertilizing.
Lawn Size and Coverage
Ensure the fertilizer coverage matches your lawn size to optimize cost-effectiveness. Some products cover up to 12,000 sq.ft., while others suit smaller areas, necessitating multiple purchases for large lawns.
By evaluating these aspects, you can select a fertilizer that fits your lawn’s specific needs, promotes vigorous St Augustine turf, and keeps your lawn attractive and healthy year-round.