How Long Does It Take For Grass Seed To Grow?

Most grass seed will start to grow in 10 to 14 days, but it can take up to 30 days sometimes. When you put grass seed in your yard, it can seem like it takes forever for the grass to start growing.

Factors That Affect How Long It Takes Grass To Grow

When you find yourself thinking, “Seriously, how long does it take for grass to grow?!” Just keep a few things in mind that will change the process:

  • Type of grass seed
  • Germination time
  • Weather
  • Soil conditions

Type Of Grass Seed

How Long Does It Take For Grass Seed To Grow

How long grass seed takes to grow depends, of course, on what kind of grass seed you use. Most of the grass seed in Northeast Ohio is what are called “cool-season grasses.” The best temperature for that kind of grass seed to grow is between 60 and 75 degrees Fahrenheit.

In Northeast Ohio, Kentucky Bluegrass, Bentgrass, Ryegrass, and Fescue are some of the cool-season plants that grow most often.

Cool-season grasses do best when they are planted in the early spring or late fall. This is because the plants don’t have to deal with the heat and dryness of summer.


Germination time is another thing that affects how long it takes for grass seed to grow. The process by which a seed grows into a plant is called germination. How long it takes for new grass to grow from a seed depends on the type of grass seed.

  • Ryegrass: Ryegrass seeds generally sprout in 5–10 days.
  • Fescue: Usually, fescue seeds take 7–14 days to grow.
  • Bentgrass: Most bentgrass seeds take 10 to 14 days to grow.
  • Kentucky Bluegrass: Kentucky Most bluegrass seeds take 14–30 days to grow.


How long grass takes to grow can depend on the weather. Cooler temps and too much water from heavy spring rains are two of the most common things that slow grass growth.

You can’t always avoid temperatures that are cooler than usual or a lot of rain, but it’s a good idea to check the long-range weather before planting.

As was already said, cool-season grass grows best between 60 and 75 degrees Fahrenheit in Northern Ohio. If you plant when it’s this warm, you might get better results.

Soil Conditions

In addition to good weather, you should keep an eye on the grass’s dirt. The pH of the soil can change how long it takes grass to grow. Cool-season grasses do best in soil with a pH between 6.0 and 7.2.

To make sure your grass gets enough water, water the dirt a few days before you plant grass seed. Soak the ground until it is six to eight inches deep. After you put grass seed, you should water it once or twice a day, unless rain is keeping the soil moist.

And don’t forget to keep an eye out for pests in the yard. These animals can make it hard for grass to grow. To help your grass grow faster, keep pests and bugs that eat grass seed away from the seeds.

Help With Growing New Grass From Grass Seed

If you want to shorten the time it takes grass seed to grow, keep the above things in mind and do what you can to make the best conditions.

Plant when the weather is warm and use your favorite kind of grass seed. Don’t let the earth get too wet, and if you need help, ask for it.

Grass Growth Timeline

In general, how long does it take to grow grass seed? It can take anywhere from seven to twenty-one days, depending on the type of grass and the weather. If you take care of your yard well, it could be full and ready to cut in a month.

Hire a local lawn seeding service if you need help figuring out the best type of grass for your yard and how long it will take to grow. They will be able to tell you what to do.

  • From day 1 (when the seeds were planted) to day 14 (when the sprouts were seen): Four times a day for 15 minutes.
  • Day 15 to Day 21: Water for 30 minutes once a day.
  • Days 22 to 28: Take a 40-minute bath once every other day.
  • Days 29 and beyond: Water for 45 minutes three times a week, which is enough to give your plants 1.5 inches of water per week. Skip watering when it rains enough.

Warm- Vs. Cool-Season Grass Seed Growth

It’s important to choose the right type of grass seed for the climate in your area, since different types of seeds grow best at different temperatures. You can choose between plants that grow best in cool or warm weather.

Keeping this in mind, the type you choose is also a big factor in how long grass takes to grow. Cool-season grasses usually start to grow the fastest, while warm-season grasses will take longer.

Warm-Season Grasses

Warm-season plants can sprout in anywhere from 7 to 30 days.

If you put these kinds of warm-season grasses, you can expect them to start growing:

  • Bahia grass: 28 days
  • Bermuda grass: 7–14 days
  • Centipede grass: 14 days
  • St. Augustine grass: 7–14 days
  • Zoysia grass: 14–21 days

Cool-Season Grasses

Cool-season grasses can start to grow as soon as four days after planting. Kentucky bluegrass, on the other hand, can take up to 21 days.

Here are the basic times for planting and harvesting these cool-season grasses:

  • Fine fescue: 4–8 days
  • Kentucky bluegrass: 14–21 days
  • 5–7 days for perennial ryegrass
  • Tall fescue: 4–14 days

When To Plant Grass Seeds

For a healthy yard, planting at the right time is the first step. Cool-season grasses do best when they are planted in the spring, when the temperature stays between 60 and 70 degrees Fahrenheit. You can also put grass seed in the fall, but make sure the sprouts have enough time to grow strong before the first expected frost date in your area.

Warm-season grasses should be planted in the middle to late spring or early summer, when the weather is just starting to get warmer. Aim for temperatures of around 80 degrees Fahrenheit during the day, and wait until your area is no longer at risk of cold. Remember that late summer or early fall is the best time to re-seed a yard.

How Long Does Grass Take To Grow Back After Mowing?

After the first time you cut the grass, it should grow about 0.8 inches per week. If the weather is good, it could grow 1 inch or more in a week. Again, the type of grass and the way it grows will be very important. When it’s too hot or too cold, most plants stop growing and go into a state called dormancy.

Mowing Your New Lawn

Before you mow your new grass for the first time, you should wait at least a month, or until the grass blades are 4 to 4 1/2 inches long. After that, wait until the grass is about 2 1/2 to 3 inches long before cutting it again. Remember that it’s always best to find out what works for the type of grass you have.

To keep your yard healthy and full of life, never cut more than a third of the grass at once. If you mow your grass too deeply, it won’t be able to keep nutrients and will become thin and weak over time.

Frequently Asked Questions

How Often Do You Need To Water New Grass Seed?

At least twice a day, water the grass seeds you just planted: once in the morning, before the hot afternoon sun comes out, and again in the late afternoon, after the sun has gone down. It’s important to keep the soil fairly moist, but not so much that it floods the seeds. After about two weeks, you can water your lawn once a day instead of twice.

Will Grass Seed Grow If I Throw It Down?

Even though you can plant grass seeds by throwing them on the ground, this isn’t the best way to do it. By making changes to the dirt and getting it ready ahead of time, you can make sure that the seed has the best chance of germinating. If you just throw the seeds on the ground without preparing the dirt first, they are more likely to get blown away, eaten by birds, or not grow at all.

Can You Speed Up Grass Seed Germination?

It is possible to speed up grass seed sprouting, but it takes a lot of extra work and time.

Will Grass Seed Germinate On Top Of Soil?

Grass seed will grow if you put it on top of dirt. It’s best to spread grass seeds shallowly, since they can’t grow through surfaces that are piled up. With proper care, tilling the earth and spreading the seeds out evenly with a rake will help them grow.

How Quickly Does Grass Seed Dry Out?

In warm weather, grass seed can dry out in a day if it isn’t watered. To make sure your grass grows past the seed stage, it’s best to keep the grass seed wet while it’s germinating.

To keep the grass seeds from drying out, you can water them early in the day and again after the hottest part of the day.

How To Pre-Germinate Grass Seed?

Before grass seed can grow, it needs to be soaked to break its top coat. This can take up to five days if the water is changed every twelve hours. If time is short, it can be stopped after three days. After the grass seeds have been soaked, they can be planted in well-tilled dirt in the yard. Mist or lightly water the seeds every day during this time to keep them moist. Most types of grass seed should sprout after two weeks, and if a mix of seeds is used, they should all sprout around the same time because they were soaked.

Will Grass Seed Grow If I Just Throw It Down?

If you just throw grass seed on the ground or dirt, it probably won’t grow well because there won’t be enough shade or care for the seeds to sprout. Growing grass in well-tilled, well-fertilized soil will give you the best results and is worth the work if you want a beautiful outdoor place.

How Long Does It Take For Grass Seed To Germinate In October?

Depending on the type of grass, it can take from two to four weeks for grass to grow in October. Even though the weather is cooler in late fall, cool-season plants can still sprout and grow roots. However, you might not see their full potential until spring.

How Long For Grass Seed To Grow 3 Inches?

Under the best growing conditions, it can take up to 30 days for grass to grow enough to notice, which could be up to 3 inches. Then you might wonder, “How quickly does grass grow?” Most established grass grows between 2 and 6 inches per month, depending on the type. 

This means that it will probably take at least a month for grass grown from seed to reach 3 inches in height, since most of its energy goes to the growing and elongation stages of its growth cycle.