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The Daily Insight

When should I plant St Augustine grass seed

Author

John Thompson

Updated on May 17, 2026

St. Augustine grass grows best in the warmth of spring and summer, when high temperatures are normally 80-100 °F. Plant St. Augustine grass plugs or sod in full sun, at least 90 days before your region’s first estimated fall frost, to give the grass plenty of time to establish.

Can I plant St. Augustine from seed?

ANSWER: St. Augustine grass does not generally produce viable seeds like other types of grasses do. … Augustine grass must be established vegetatively using sod or plugs. April and May would be excellent months to lay sod or plant plugs to establish a new lawn or repair damage done to a St.

When should I reseed St. Augustine?

After winter, especially in regions with harsher weather, inspect your lawn for patches that may need reseeding or resodding. St. Augustine will spread and fix small patches, but it may be faster to reseed large patches. However, wait to reseed until after the chance of frost has passed.

How late can I plant St Augustine grass?

Augustine grass (Stenotaphrum secundatum) is a warm season turfgrass with a medium-green shade. It grows best in USDA zones 8 through 10. You can lay down St. Augustine grass sod anytime when the soil isn’t frozen, but it will be more successful in hotter weather.

What is the best grass seed to mix with St. Augustine?

Bermuda mixes well with St. Augustine because it will quickly fill in the patches in the lawn that would take longer to reach with all sod. Bermuda grass seed is less expensive to plant and will spread quickly across your lawn.

What grass seed is similar to St Augustine?

Zoysia Grass – Zoysia is similar in thickness to St. Augustine but is more drought-resistant. It can handle partial shade, and can stand up to the heavy traffic of an active family.

Can you overseed St Augustine?

It is recommended to never overseed St. Augustine lawns due to the fact it can be hard to get good seed contact without having to scalp and damage the existing yard. The main choice for which cool-season turf to overseed with is generally between annual ryegrass and perennial ryegrass.

How can I make St. Augustine grass spread faster?

Augustine grow and spread faster, be sure to start with a well-aerated soil that is pH tested. Consider planting high-density plugs for faster results. Lastly, make sure to keep your lawn well-watered, fertilized, and weeded. St Augustine will thrive and spread the quickest in a healthy, nurtured environment.

What temperature kills St. Augustine grass?

St Augustine grass will go dormant when the soil temperatures fall below 55 degrees. If the soil remains warmer than 60 degrees all year, the grass will stay green. It will, however, slow in growth as the soil drops in temperature. One of the disadvantages of St Augustine grass is its poor wear tolerance.

Which grass is better Bermuda or St Augustine?

Bermuda grass does well in zones 7, 8, 9 and 10, while St. Augustine grass really only performs well in zones 8 through 10. So, if you live along the Gulf Coast or warm coastal areas of the country, St. Augustine grass is a better choice.

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Can you use Scotts Turf Builder on St Augustine?

With a special formula designed for Southern lawns that works to protect your grass against heat and drought, Scotts Turf Builder is great for all grass types, including St. Augustine grass. This fertilizer is an easily applied all-in-one treatment that encourages your lawn to absorb water and nutrients naturally.

How do you thicken St. Augustine grass?

  1. Preparation. It is best to purchase St. …
  2. Irrigation. This is especially important after installing sod for the first time. …
  3. Mowing. These tips are quite simple: leave no less than two thirds of its length intact, mow with sharp blades, and don’t bag the trimmings. …
  4. Fertilizing. …
  5. Weeding.

Is Iron good for St. Augustine grass?

St. Augustine grass can be restored to a healthy, green color through the application of iron chelate or iron sulfate. Foliar applications of iron are better for restoring grass to a healthy color than soil applications.

How do you tell the difference between crabgrass and St. Augustine grass?

The leaf blades are much wider on crabgrass than lawn grasses (except perhaps St. Augustine), and the blade has a fold line down the center. The blades grow from separate locations on the stem, instead of from a central point.

How short should you cut St. Augustine grass?

Mowing: The ideal mowing height for St. Augustinegrass can range from 2½ to 4 inches depending on the specific site and management regime and is best determined by the growing conditions. Lawns in shady areas perform better when mowed at 3 to 4 inches high.

Will St. Augustine grass overtake Bermuda grass?

Augustine grass is the coveted turf of choice, while Bermuda grass is an invasive nuisance. … Augustine will easily choke out Bermuda and establish a full, thick turf. Still, in any climate where St. Augustine and Bermuda thrive, maintenance practices and microclimates will determine how successful the turf will be.

How do you reseed St. Augustine?

The easiest way to revive St. Augustine grass is to water your lawn properly, get rid of pests such as grub worms, and improve soil quality. Enough water helps grass survive the drought that’s common during summer, while grub control prevents root damage that usually kills grass quickly.

Does fescue overtake St. Augustine?

Also known as Marathon, the ubiquitous lawn grass for Southern California landscapes. Like all plants, it has a dormant season, which is summer. Augustine or Bermuda in the past, these vigorous grasses can overtake it. …

Why is my St Augustine grass turning yellow and dying?

ANSWER: This yellowing is likely due to all of the rain. Rains leach nitrogen out of the soil, which causes some yellowing. Also, when the soil stays wet, grass roots are stressed and don’t work as well. So the roots may not be properly absorbing minerals like nitrogen from the soil.

Why is my St Augustine grass turning brown?

St. Augustine grass can turn brown and die due to drought stress, fertilizer burn, dormancy, poor soil quality, or grub damage. A brown St. Augustine lawn that appears dead can also be a sign your grass is still in dormancy or is suffering from frost burn.

Will St Augustine come back after freeze?

Both grasses can handle some cold, but extended periods of extreme cold can very easily damage these two types of grass. Centipede and St. Augustine are what are called stoloniferous grasses. … As the weather warms up, and the grass begins to grow again, an area that was killed or damaged by the cold will not green up.

How deep are St Augustine grass roots?

Augustine roots should be at least 6-inches deep. Over-watering and watering shallowly contribute to poor shallow root systems. Unfortunately, this is usually what we see in North Texas lawns, due to heavy compacted soils and improper maintenance.

How long do St Augustine plugs take to spread?

Water daily or as needed until the plugs are firmly rooted and starting to spread. This will normally take about 7-14 days for the roots to establish. Afterward, water weekly unless your lawn is receiving generous rainfall.

Will St Augustine grass fill in bare spots?

If your grass is a St. Augustine grass lawn, you’ll want to sod or plug your bare spots. Purchase a few pieces of sod or enough plugs to cover your bare spots from your local garden center. Then prepare the area by applying a generous layer of Scotts® Turf Builder® Lawn Soil.

What is the easiest grass to grow in Texas?

  • Zoysia. Zoysia is a grass option that many Texas homeowners are very happy with. …
  • Kentucky Bluegrass. Kentucky bluegrass is an extremely common grass type, especially in the Texas climate. …
  • Centipedegrass. …
  • Carpetgrass. …
  • Buffalograss. …
  • St. …
  • Bermuda.

Is MSMA safe for St Augustine?

It is one of the most effective products and is safe on all lawn grasses, including St. Augustine and Centipede. The older recommendation is Image plus MSMA. While this is effective on nutsedge, you would have to use at least two applications, and it tends to burn back your lawn fairly badly.

Can St Augustine grow in shade?

Although St. Augustine grass tolerates some shade, it won’t grow thick and beautiful in deep shade. You’ll see instead a thin, spindly lawn. The turf requires at least four hours a day of sun to really do well.

Is Miracle Grow good for St. Augustinegrass?

According to the manufacturer, Miracle-Gro Miracid Plant Food can be applied to the lawn as a fertilizer, but it will not do anything for fungus. You would need to use a fungicide like Propiconazole 14.3. This product is labeled to treat take-all patch in St. Augustine turfgrass.

Is floratam the same as St. Augustine?

Like most St. Augustine grasses, Floratam is coarse-textured grass, but a distinguishing feature of Floratam is its longer and wider leaf blades. This dark-green cultivar grows rapidly in both spring and summer. It is less cold and shade tolerant than other St.

Can preen be used on St. Augustinegrass?

Preen® Lawn Weed Killer may be used on residential and ornamental lawns, vacant lots, playgrounds and other similar areas where broadleaf weeds are present. Established turf of bahiagrass, bermudagrass, Kentucky bluegrass, centipedegrass, fescues, perennial ryegrass, St. Augustinegrass, and zoysiagrass may be treated.

How do you cure yellowing St Augustine?

To remedy the yellow areas, you will need to apply a chelated (Key-late-ed) iron fertilizer to your lawn. But get out those reading glasses and find a comfortable spot to properly see the iron fertilizer’s fine print directions. Be sure to follow all package instructions exactly.