St. Augustine grass is a popular choice for lawns, known for its thick, lush carpet. But to keep it looking its best, it needs the right nutrients. Choosing the best fertilizer for St. Augustine can be tricky. There are so many options, and what works for one lawn might not work for another. I’ve spent years trying different fertilizers on my own St. Augustine lawn, and I’ve learned a thing or two about what really makes a difference. Here’s my take on the top contenders to help you make the best choice.
Quick Recommendations: Top Fertilizers for St. Augustine Grass
- Best Overall: Scotts Green Max Lawn Food – Quick greening and iron supplement.
- Best Slow-Release: Milorganite Slow-Release Nitrogen Fertilizer – Environmentally friendly and long-lasting.
- Best Weed & Feed: Scotts Turf Builder Weed & Feed – Kills weeds while feeding your lawn.
- Best for Southern Lawns: Southern Ag Lawn Fertilizer – Formulated for the specific needs of southern grasses.
- Best Organic Option: Espoma Organic Lawn Food – All-natural ingredients for a healthy lawn.
Top 5 Best Fertilizer For St. Augustine Reviews
1. Scotts Green Max Lawn Food
Scotts Green Max Lawn Food is designed for rapid greening. This fertilizer includes iron, which helps your St. Augustine grass achieve a deep, rich color quickly. It’s a great option when you want to see results fast.
Pros:
- ✅ Noticeable greening in just a few days.
- ✅ Contains iron for enhanced color.
- ✅ Easy to apply with a spreader.
Cons:
- ❌ May require more frequent applications than slow-release options.
- ❌ Can stain concrete if not cleaned up immediately.
- ❌ Higher risk of burning the lawn if over-applied.
Verdict: If you’re looking for a quick fix to a dull-looking lawn, Scotts Green Max is a solid choice. But be careful with application rates.
2. Milorganite Slow-Release Nitrogen Fertilizer
Milorganite is a slow-release nitrogen fertilizer. It’s made from heat-dried microbes that have digested organic matter. This means it feeds your lawn gradually, reducing the risk of burning and providing consistent nutrients over a longer period.
Pros:
- ✅ Slow-release formula minimizes the risk of burning.
- ✅ Environmentally friendly, made from recycled materials.
- ✅ Provides a consistent supply of nutrients for up to 10 weeks.
Cons:
- ❌ Has a distinct odor that some people find unpleasant (though it dissipates).
- ❌ May not provide as rapid greening as some other fertilizers.
- ❌ Can be more expensive than synthetic options.
Verdict: Milorganite is a great option if you prioritize a slow-release, environmentally friendly fertilizer. It’s gentle on your lawn and good for the planet.
3. Scotts Turf Builder Weed & Feed
Scotts Turf Builder Weed & Feed does double duty. It fertilizes your St. Augustine grass while also killing common lawn weeds. This can save you time and effort by combining two essential lawn care tasks into one application.
Pros:
- ✅ Kills common lawn weeds like dandelions and clover.
- ✅ Feeds your lawn for a thicker, greener appearance.
- ✅ Convenient 2-in-1 formula.
Cons:
- ❌ Must be applied carefully to avoid damaging desirable plants.
- ❌ Not effective on all types of weeds.
- ❌ May not be suitable for newly seeded or sodded lawns.
Verdict: If you’re battling weeds and want to fertilize at the same time, Scotts Turf Builder Weed & Feed is a convenient solution. Just make sure to follow the instructions carefully.
4. Southern Ag Lawn Fertilizer
Southern Ag Lawn Fertilizer is specifically formulated for the needs of southern grasses like St. Augustine. It contains a balanced blend of nutrients that promote healthy growth and a strong root system, which is important in warmer climates.
Pros:
- ✅ Formulated for southern grasses like St. Augustine.
- ✅ Promotes strong root development.
- ✅ Contains essential micronutrients.
Cons:
- ❌ May not be as effective in cooler climates.
- ❌ Can be harder to find in stores outside the southern US.
- ❌ Requires precise application to avoid burning.
Verdict: If you live in the South and have St. Augustine grass, Southern Ag Lawn Fertilizer is a good choice. It’s designed to meet the specific needs of your lawn.
5. Espoma Organic Lawn Food
Espoma Organic Lawn Food is an all-natural fertilizer that provides a gentle, slow-release feeding for your St. Augustine grass. It’s made from organic ingredients and won’t burn your lawn. It’s a great option if you’re looking for a more sustainable approach to lawn care.
Pros:
- ✅ All-natural and organic ingredients.
- ✅ Slow-release formula minimizes the risk of burning.
- ✅ Safe for pets and children.
Cons:
- ❌ May not provide as rapid greening as synthetic fertilizers.
- ❌ Can be more expensive than conventional options.
- ❌ May require more frequent applications than some other slow-release fertilizers.
Verdict: Espoma Organic Lawn Food is a great choice if you prefer organic lawn care. It’s safe, gentle, and good for the environment. It’s my go-to when I want to keep things natural.
Buying Guide
Choosing the right fertilizer for your St. Augustine grass can feel overwhelming. Here are a few key things to consider:
- Nutrient Ratio: Look for a fertilizer with a balanced N-P-K ratio (Nitrogen, Phosphorus, Potassium). St. Augustine grass typically benefits from a fertilizer with a higher nitrogen content, but it’s important to consider your soil’s specific needs. A soil test can help you determine the right ratio.
- Slow-Release vs. Quick-Release: Slow-release fertilizers provide nutrients gradually over a longer period, reducing the risk of burning. Quick-release fertilizers provide a burst of nutrients for rapid greening, but they require more frequent applications and can be more likely to burn your lawn.
- Weed Control: If you’re battling weeds, consider a weed and feed product. But be careful when applying these products, as they can damage desirable plants if not used correctly.
- Organic vs. Synthetic: Organic fertilizers are made from natural ingredients and are generally safer for the environment. Synthetic fertilizers are typically more concentrated and can provide faster results, but they can also be more likely to burn your lawn.
- Granular vs. Liquid: Granular fertilizers are applied with a spreader and provide a slow-release feeding. Liquid fertilizers are mixed with water and sprayed onto your lawn for a quick boost of nutrients. I personally prefer granular for even distribution.
FAQs
Q: How often should I fertilize my St. Augustine grass?
A: Typically, you should fertilize St. Augustine grass every 6-8 weeks during the growing season (spring and summer). Always follow the instructions on the fertilizer label.
Q: Can I use too much fertilizer?
A: Yes! Over-fertilizing can burn your lawn and damage the roots. Always follow the recommended application rates and avoid overlapping when applying fertilizer.
Q: What is the best time of day to fertilize my lawn?
A: It’s best to fertilize in the early morning or late evening when the temperatures are cooler. This helps prevent the fertilizer from burning your lawn.
Q: Should I water my lawn after fertilizing?
A: Yes, watering helps the fertilizer soak into the soil and prevents it from burning the grass. Water thoroughly after applying fertilizer, unless the product instructions say otherwise.
Q: How do I know if my lawn needs fertilizer?
A: Signs that your lawn needs fertilizer include slow growth, yellowing or pale green grass, and increased weed growth. A soil test can also help you determine if your lawn is lacking essential nutrients.
Conclusion
Finding the best fertilizer for St. Augustine grass really comes down to your specific needs and preferences. Whether you’re looking for a quick green-up, a slow-release feeding, or an organic option, there’s a fertilizer out there that’s right for you. I’ve tried all of these at different times, and each has its place. Consider your lawn’s current condition, your budget, and your environmental concerns when making your choice. With the right fertilizer, you can keep your St. Augustine lawn looking lush and healthy all season long.
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