How Fast Does St. Augustine Grass Spread?

St. Augustine grass is dark green, rough textured, and thick, which looks like a carpet and enhances the overall beauty of your yard or garden.

How Fast Does St. Augustine Grass Spread? St. Augustine grass can spread in 7-14 days or within two weeks if suitable conditions and weather are provided. You can make this turf grass grow faster by choosing the right soil type, good fertilizer, frequent watering, mowing, proper sunlight, and aeration. It can quickly grow and spread faster in spring and early summer.

You can grow it using sod or grass plugs, which spread quickly and make the bare ground look green and attractive. People love to grow it in their gardens because it competes with weeds and other parasites.

How fast can St. Augustine grass spread?

St. Augustine grass is famous for its faster growth and thick texture. It can grow in warm and humid places, such as Africa, California, north central Texas, and Australia.

You can plant the sod or the plugs to grow it in bare soil or yard, and it can start establishing in 7-14 days or within two weeks with proper care and a suitable environment.

Different factors affect its growth, such as the maintenance schedule, soil type, planting season, and mowing.

It can spread under high traffic, such as it is not prohibited to walk on the soil where you plant this grass.

It can grow faster under suitable conditions and make the lawn greener and more attractive, where the kids play happily. Moreover, the fast-growing rate is due to the stolons planted above the ground instead of rhizomes that are rooted under the soil and takes more time to spread.

It grows more rapidly when established and needs a natural fertilizer and adequate maintenance to spread in the entire area in less time.

How can I make St. Augustine grass spread quickly?

You can make the St. Augustine grass grow quickly using the following methods and techniques.

Right soil type

Choosing the right soil type is essential when planting grass plugs or sod in the lawn because it significantly affects growth.

Soil plays an essential role in its growth, as dry sanded soil having pH 5-8.5 can help it spread and grow faster and is considered the best option for St. Augustine grass. The slightly acidic soil causes it to grow more efficiently.

Waterlogged or clay soil is not suitable for fast growth, as it does not allow oxygen and air to enter the roots and obstruct the growth development in this area.

The slow growth problem is due to the water logging and more acidic soil used in the lawn or yard for planting it. People use lime or sulfur to reduce the pH and put sanded or well-drained soil when planting this grass.

Suitable fertilizers

Fertilizers play a significant role in maintaining and growing a lawn, especially if you are planting new sod or plugs on the bare soil.

Natural and less toxic fertilizers are essential to make it spread more quickly, such as the fertilizers with high phosphorous and nitrogen contents are best for St. Augustine grass.

High phosphorous fertilizers cause better and strong root growth and provide other benefits. The fertilizers are essential to provide the necessary mineral and food for quick spread.

It provides better thickness, color, and texture, and you can apply the fertilizers for approximately 5-7 weeks to minimize the damage due to parasites and weeds and better growth.

Gardeners recommend using fertilizers during the growing seasons and more often when growing or spreading. 

Frequent watering

Plants, grass, and soil need adequate water to grow and survive for a long time, as it causes dormancy and starts losing its color and thickness if you do not water it regularly.

Watering it twice or more often a day can help it to spread quickly because they need more water during the root growth, depending on the weather conditions.

I planted St. Augustine grass on my lawn and watered it t times a day because of the hot weather. The soil sucks more water in hot weather, and it cannot grow without proper watering.

It will take more effort and time to grow the dormant grass; therefore, ensure it gets adequate water. Avoid over-watering it because it causes the soil to become clay and can affect the establishing roots.


Mowing the grass too much or too less can affect its growth and not spread quickly to cover the bare soil areas. Professionals recommend mowing this grass 3-4 inches for better growth once the roots are established.

Mowing it too low can cause damage to the roots because they spread due to stolons. Mowing the St. Augustine grass depends on the growth rate, such as it grows slower in too hot weather, and you can trim it after 9-10 days.

However, it is better to mow it after every week in the growing season because the overgrown grass will not allow it to spread and suppress its growth.

Excessive mowing can cause this to grow horizontally instead of vertically, and your lawn will present a more attractive and smooth appearance.

Moreover, the correct mowing height also depends on your preferences, such as you can mow it shorter if you have more traffic in your lawn.

It is better to mow it when the temperature is warm and dry weather, and avoid mowing after rain or in a humid environment, as you cannot estimate the correct height to mow it

Remove weeds

Weeds are small plants growing where they are not needed and can survive and grow in usually all soil types.

They take the essential nutrients from the soil and fertilizers the grass needs and affect its growth and spread. It cannot grow if it has weeds all around this area.

It is better to remove the weeds from the soil before planting the St. Augustine grass using pre-emergent herbicides. It will help stop the weeds from growing and remove the existing weeds affecting their growth.

Large weeds in the lawn can hinder the spread and share the nutrients and water with it, which can slow down its growth and spread.

Adequate sunlight

Sunlight is another essential factor that affects its growth and helps to spread it to eroded and bare soil areas. St, Augustine grass needs a warm environment to grow; therefore, sunlight plays a central role in its growth.

It needs approximately 6-7 hours of sunlight to spread quickly, as the plants and grass cannot survive without sunlight and decay over time.

You often notice the bare soil area is under the tree shade because it cannot get adequate sunlight, which hinders growth.


Like other plants, grass also needs oxygen and air for survival. Aeration is a method of digging small holes into the soil to allow air, oxygen, water, and essential nutrients to enter the soil and roots.

It can strengthen the roots, and the lawn can bear high traffic without damage. You can aerate the yard or lawn once a year to improve the soil drainage, grass quality, and a healthy environment for the garden.

What is the best season for St. Augustine grass to grow faster?

The best season for St. Augustine grass is spring and summer because they need warm weather to grow and spread its root to bare soil.

You can plant it in late spring and mid-summer, or some people prefer to plant it between May and August because the weather is hot enough for them to grow properly.

It can survive in all seasons, but it is better to grow it in mid-summers because it can spread quickly in summer.

Winter and fall are not suitable for planting it because they become dormant in cold weather and cannot spread faster.

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