St. Augustine grass forms a dense, coarse-textured lawn that thrives in warm coastal regions, while centipede grass requires less maintenance and fertilizer. When you are trying to decide between st augustine grass vs centipede, the choice really comes down to how much time you want to spend outside and what your soil looks like. Both are warm-season grasses, but they have very different personalities.
If you pick the wrong one, you will spend years fighting it. So, let’s break down the differences so you can make the right call for your yard.
St Augustine Grass Vs Centipede: The Main Differences
These two grasses look similar from a distance, but they are actually quite different up close. St. Augustine has broad, thick blades that feel almost coarse. Centipede has a finer texture and a lighter, apple-green color. That color difference is often the first thing people notice.
St. Augustine is a heavy feeder. It wants water, fertilizer, and attention. Centipede is the lazy man’s grass. It grows slowly, needs little food, and prefers acidic soil. If you throw too much fertilizer on centipede, it will actually die. That is a big mistake many homeowners make.
Growth Habits And Appearance
St. Augustine spreads by stolons, which are above-ground runners. It forms a thick, carpet-like turf that chokes out weeds. Centipede also spreads by stolons, but it grows much slower. It creates a more open, patchy lawn if you do not mow it correctly.
When it comes to shade, St. Augustine wins. It handles partial shade better than almost any other warm-season grass. Centipede needs full sun. If you have trees, centipede will thin out and look terrible.
Mowing Requirements
St. Augustine needs to be mowed higher. You should keep it at about 3 to 4 inches tall. This helps it stay thick and cool. Centipede should be mowed lower, around 1.5 to 2 inches. If you let centipede get too tall, it gets stemmy and ugly.
You will mow St. Augustine more often because it grows faster. Centipede is a slow grower, so you might only mow every 7 to 10 days in the summer.
Climate And Growing Zones
Both grasses love heat, but they have different cold tolerances. St. Augustine is very sensitive to cold. A hard freeze can kill it to the ground. It is best for the Gulf Coast, Florida, and southern California. Centipede is a bit hardier, but not by much. It is popular in the Southeast, from the Carolinas down to the Gulf.
If you live in a transition zone, neither grass is a great choice. You might need to look at zoysia or Bermuda instead.
Salt Tolerance
If you live near the coast, this is a huge factor. St. Augustine has good salt tolerance. It can handle sea spray and salty irrigation water. Centipede does not like salt at all. It will brown out and struggle near the ocean.
Drought Tolerance
Neither grass is truly drought-tolerant. But St. Augustine wilts faster and shows stress sooner. It needs about 1.5 inches of water per week. Centipede can survive longer without water, but it will go dormant and turn brown. Once the rain returns, centipede usually bounces back quicker.
Soil Preferences And Fertilizer Needs
This is where centipede really shines. It loves poor, sandy, acidic soil. It has a shallow root system and does not need much nitrogen. In fact, you should only fertilize centipede once a year, in late spring. Use a low-nitrogen fertilizer like 15-0-15.
St. Augustine is the opposite. It wants rich, well-drained soil with a pH between 6.0 and 7.0. You will need to fertilize it 3 to 4 times a year. If you skip feedings, St. Augustine gets pale and thin.
Iron And PH Issues
Centipede is prone to iron chlorosis, which shows up as yellow leaves. This happens when the soil pH is too high. You can fix it with an iron supplement, but you must keep the soil acidic. St. Augustine also needs iron, but it is less picky about pH.
Before planting either grass, do a soil test. This will save you a lot of guessing later.
Shade Tolerance And Sunlight Needs
Let’s be clear: St. Augustine is the best shade-tolerant warm-season grass. It can survive with 4 to 5 hours of direct sun. Centipede needs 6 to 8 hours of full sun. If your yard is shady, centipede is not going to work.
However, even St. Augustine has limits. Deep shade under oak trees will still kill it. You might need to consider a ground cover like liriope in those spots.
Traffic And Wear Resistance
St. Augustine has a soft, spongy feel, but it does not handle heavy foot traffic well. Kids and dogs running around will wear it down. Centipede is a bit more resilient, but it also struggles with constant traffic. Neither grass is good for a sports field.
If you have a busy yard, consider planting a durable grass like Bermuda in the high-traffic areas.
Pests And Diseases
St. Augustine is a magnet for pests. Chinch bugs are the biggest problem. They suck the sap out of the grass and cause brown patches. You also have to watch for gray leaf spot and brown patch fungus. Centipede has fewer pest issues, but it can get ground pearls and nematodes.
Centipede is also prone to a disease called centipede decline. This causes the grass to slowly die out in patches. It is often caused by over-fertilizing or wrong mowing heights.
Weed Pressure
Because St. Augustine grows so thick, it blocks out most weeds. Centipede is thinner, so weeds like crabgrass and henbit can invade easily. You will need a good pre-emergent herbicide for centipede in the spring and fall.
Cost And Establishment
St. Augustine is almost always sold as sod or plugs. It does not produce viable seeds. This makes it more expensive to install. Centipede can be grown from seed, which is much cheaper. However, seeding centipede takes time and patience.
If you are on a budget, centipede is the winner. But remember, you get what you pay for. St. Augustine gives you a lush, luxurious lawn faster.
How To Plant Centipede From Seed
- Prepare the soil by tilling and removing debris.
- Test the pH and adjust it to between 5.0 and 6.0.
- Spread the seed at a rate of 1/4 to 1/2 pound per 1,000 square feet.
- Rake the seed lightly into the soil, no deeper than 1/4 inch.
- Keep the soil moist until germination, which takes 14 to 21 days.
How To Install St Augustine Sod
- Clear the area of old grass and weeds.
- Level the soil and add compost if needed.
- Lay the sod in a brick pattern, pressing edges tightly together.
- Water deeply immediately after installation.
- Keep the sod moist for the first two weeks.
Maintenance Schedule Comparison
Here is a quick breakdown of what each grass needs throughout the year. This will help you decide if you have the time and energy for St. Augustine.
St Augustine Grass Maintenance
- Mow weekly in summer at 3.5 inches.
- Fertilize every 6 to 8 weeks during the growing season.
- Water deeply 2 to 3 times per week.
- Apply pre-emergent herbicide in spring and fall.
- Check for chinch bugs monthly.
Centipede Grass Maintenance
- Mow every 7 to 10 days at 1.5 to 2 inches.
- Fertilize only once a year in late spring.
- Water only when the grass shows signs of stress.
- Apply pre-emergent herbicide in early spring.
- Watch for iron deficiency and apply chelated iron as needed.
Which Grass Is Better For Your Lawn?
The answer depends on your lifestyle. If you want a beautiful, thick lawn and you are willing to work for it, choose St. Augustine. It looks amazing and feels great underfoot. Just be ready to spend time and money on water and fertilizer.
If you want a low-maintenance lawn that you can mostly ignore, go with centipede. It is perfect for weekend warriors who do not want to spend every Saturday mowing and feeding.
Consider Your Local Climate
Look at your neighbors’ yards. What is growing well? If you see thick, dark green lawns, they are likely St. Augustine. If you see lighter green, slower-growing lawns, they are centipede. Follow the local trend because it usually means the grass is suited to the area.
Consider Your Soil Type
Centipede thrives in sandy, acidic soil. If you have heavy clay or alkaline soil, St. Augustine is a better choice. You can amend the soil, but it is easier to work with what you have.
Common Problems And Solutions
Even with the right grass, problems happen. Here are some common issues and how to fix them.
Brown Patches In St Augustine
This is usually chinch bugs or brown patch fungus. Check the edges of the brown area for small black bugs with white wings. If you see them, apply an insecticide. If not, it might be fungus, so reduce watering and apply a fungicide.
Yellowing In Centipede
This is almost always iron chlorosis. The grass is not getting enough iron because the soil pH is too high. Apply a chelated iron spray. Do not add nitrogen, as this will make the problem worse.
Thinning In Shaded Areas
If your St. Augustine is thinning under trees, trim the lower branches to let in more light. For centipede, you might need to remove the grass and plant shade-loving ground cover instead.
Frequently Asked Questions
Here are some common questions homeowners ask about these two grasses.
Can I mix St Augustine and centipede grass?
It is not a good idea. They have different mowing heights and fertilizer needs. Mixing them will result in a patchy, uneven lawn. Pick one or the other.
Which grass is more drought tolerant, St Augustine or centipede?
Centipede is more drought tolerant because it goes dormant and recovers better. St. Augustine wilts quickly and may die if it stays dry for too long.
Is centipede grass good for high traffic areas?
No, centipede is not very wear-tolerant. St. Augustine is also not great for heavy traffic. If you have kids or pets, consider Bermuda grass instead.
How often should I water centipede grass?
Centipede needs about 1 inch of water per week, but only if it has not rained. Water deeply once a week rather than a little bit every day.
What is the best fertilizer for St Augustine grass?
Use a slow-release fertilizer with a 3-1-2 ratio, like 15-5-10. Apply it in spring, summer, and early fall. Avoid high-nitrogen fertilizers in late fall, as they can cause cold damage.
Final Verdict: Which Should You Choose?
If you want a showpiece lawn and you live in a warm, coastal area, go with St. Augustine. It is the premium choice for a reason. You will get a thick, green carpet that makes your house look great.
If you want to save money and time, go with centipede. It is not as flashy, but it is reliable and easy. Just remember to keep the soil acidic and do not over-fertilize.
Take a look at your yard, your schedule, and your budget. That will tell you which grass is the right fit. Both are great options, but they serve different purposes. Choose the one that matches your lifestyle, and you will be happy with the result.