So you have planted your new grass seed, but how long does it take for grass to grow?
Well the short answer is it will take 7-30 days for grass to grow.
However this depends on many variables including variety of grass, frequency of watering the lawn, and the temperature!
It’s a lot to take in, but if you want to learn more about how long it takes to grow grass….
Then keep reading!
Overview On How long does it take for grass to grow?
Look, I know you want to know exactly how long it will take your new grass seed to sprout. However, there are a lot of variables when it comes to exactly how long it will take.
Some grass varieties like take as little as a few days to germinate, others may take one to two weeks.
Watering and Temperature are also critical factors as well.
Lets take a look at each factor and see how long you can expect for germination to take in your new lawn!
Grass Seed Variety and Speed of Growth
As you may suspect grass variety is a huge factor in the speed at which your lawn seed grows.
Pro Tip! No matter how long it takes for most of your grass to grow, you should not mow the lawn for at least 3-4 weeks after the seed is planted. You want to give it plenty of time to establish roots, and for all the late bloomers to catch up.
Fastest Growing Grass Seed Varieties
|Type of Grass||Days To Germinate||Season|
|Perennial Ryegrass||7-10 Days||Cool|
|Kentucky 31 Fescue||7-14 Days||Cool|
|Kentucky Bluegrass||14-21 Days||Cool|
|Bermuda Grass||7-30 Days||Warm|
|Centipede Grass||14-21 Days||Warm|
You might be saying why is there such a huge gap between the fastest and longest times?
Like I said, there are many factors which determine how long it takes for grass to grow from seed.
Grass seed variety is only the first aspect, now lets take a look at the other two major factors in how long it takes for grass to grow.
Temperature and water!
Temperature’s Impact on How Long it Takes For Grass To Grow
One huge factor in the germination rates of grass is temperature.
The time of year in which you plant the grass seed, and the climate in which you live will have a massive impact on how long it takes for grass to grow.
In fact, grass seed such as Bermuda grass seed actually requires a soil temperature of at least 70 degrees to begin germination. So if there are days in which the soil temperature is below 70 degrees, Bermuda grass seed can take up to 30 days to germinate, or as little as 7 in proper temperatures.
The Optimum Temperatures for Grass Seed Germination 2
|Seed Variety||Optimum Germination |
Temperature in Fahrenheit
|Bluegrass (All varieties)||50-86°|
These temperatures reflect average air temperature, whereas soil temperature may be closer to the high end. Most seeds sprout best in late spring, early summer and fall.
If the temperatures are too hot, or too cold, seeds will likley not take root. Therefore you want to avoid any temperature extremes when establishing a new lawn, regardless of the seed variety.
The Closer to the optimal germination temperature, the faster your grass will grow.
Know lets take a look at the final factor.
Watering and It’s Impact on Seed Germination
This may seem obvious, but the better you water, the faster the seed will germinate. But watering doesn’t only impact how fast your grass will grow, it can also affect how healthy your grass is too!
There are 3 general rules to practice when watering a lawn:
Rule one- Water longer, less often.
Watering too frequently causes grass to grow quickly upward, but the vegetation becomes leggy and thin. Worst of all, the roots form to be conditioned for lots of regular watering. Meaning that if there ever is a drought, your lawn will burn more quickly.
Rather than watering 5 minutes 3 times a day, water the lawn for 15-20 minutes one time a day. Once your new grass seed has started to germinate, start skipping watering every other day.
Rule two- Water at the right time of day.
Early morning watering is the best!
If you water mid-day you risk burning the lawn, if you water too late, you may be inviting lawn diseases such as fungi and mold.
If you can’t water in the early morning from 6 to 10am, then water as soon as the temperature starts to drop in the afternoon around 3-4 pm.
Pro Tip! Do not water when there is not time for the water to soak into the soil/atmosphere before sun down. This can lead to many diseases and lawn issues.
Rule 3-Skip Watering when it rains.
To avoid over-watering, skip your watering schedule if it rains. Its really that simple!
following these 3 rules on watering will not only help your lawn grow faster, but thicker and greener! When it comes to your own lawn, what else could you wish for!
The Bottom Line on How long does it take for grass to grow?
How long does it take for grass to grow, will depend on the factors mentioned above. As a general rule you will begin seeing results in about 2 weeks. But it can take up to a month to have grass become fully established.
Other factors we didn’t cover here are lawn fertilizer applications and whether your lawn is established or not.
In general these factors can help you determine exactly how long does it take for grass to grow in your lawn.
If you learned something new, be sure to share this article with your friends and family!
Until next time, check out more on This American Lawn.
- Beard, James Bashore. “Turfgrass: Science and Culture.” Turfgrass: Science and Culture, 1973, pp. 224–225.