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How Long Does Grass Seed Take to Fully Grow?

How Long Does Grass Take To Grow + And How to Speed Up New Lawn Growth

Are you wondering, “how long does grass seed take to grow”? Perhaps you’ve been continually seeding, watering, re-seeding, and watering again, and you’re not seeing any grass seed growth.

I’ve been there before, and like you, knowing how to plant grass – and getting grass to grow fast can be one of life’s mysteries. The solution may not be what you’re doing wrong, oftentimes, you just need to have enough patience and give your grass time to grow.

How Long Does Grass Seed Take To Grow? 

Growing grass effectively requires:  Planting grass seed at the correct depth, Good Sunlight, Sufficient watering, planting at the right outside temperature, Using well-aerated soil, and planting grass seed with a starter fertilizer.

How Long Does Grass Seed Take To Grow?

To make sure you are on the right path, here are six requirements for healthy and quick grass growth:

Germination Time:

The germination process Is how long it takes for grass seed to grow – from the time you plant grass seed to the time it begins to sprout and turn your lawn into that luscious blanket of green grass that we’re anxious to see.

Germination Time for Grass Seed is between 5 and 30 days after planting – Depending on the weather and type of grass seed you’re attempting to grow.”

But don’t worry too much about the details — we’ll walk you through how to grow grass fast below:

An age-old saying goes, “such and such is as boring as watching paint dry.” But there is something even more excruciating than that.  I’m sure you have guessed by now that I’m talking about watching grass grow. At least the paint dries in a few hours or so. But grass can take more than a month to grow fully!

How to plant grass seed
How to Get Grass Growing Quickly – BestHomeGear.Com

How To Grow Grass Faster:

  1. Plant Grass Seed Correctly
  2. Plant Grass With Available Sunlight
  3. Water Grass Seed Correctly
  4. Plant Grass Seed At the Correct Temperature
  5. Provided Oxygen To Grass Roots
  6. Plant New Grass Seed With Starter Fertilizer

Several factors contribute to the time it takes for grass seed to fully grow (or fail to grow), such as whether grass seed will grow on top of the soil or whether you need to til grass seed into the soil.  Let’s get started on how to grow new grass:

1) Plant the Grass Seed Correctly

While you may get grass seed to grow by throwing it on the ground, the large percentage of grass seed will not germinate and will, more likely, be eaten by the birds – a free meal!

Sometimes referred to as “overseeding”, the process of throwing grass seed at bare patches in your lawn is usually more of a “hope and pray” effort than a successful approach to seeding a lawn.

The best way to plant grass seed for any new lawn is to start with good, available topsoil. By laying down 1 1/2 – 2″ of topsoil at the start, the fresh topsoil – which provides shade and is rich in nutrients, will provide the perfect incubator for new grass seeds to germinate.

We recommend raking new grass seed into fresh topsoil at a depth of 1 /2 – 2″ deep.  This depth will protect grass seeds from birds, and the grass seed will remain moist, which is a significant requirement for new grass growth.  Moist soil conditions and Sunlight are essential for growing healthy grass.

2)   Plant Grass Seed With Best “Available Sunlight.”

This might be obvious, but you can see it in yards with large trees covering a considerable portion of the grass. Shade prevents the grass from taking in the amount of sunlight needed to synthesize nutrients from carbon dioxide and water.

That’s just science talk, for it can’t grow and turn green. Even though this is such an apparent cause for grass not growing, it is still one that is often overlooked.

If your yard lawn is dominated by trees, you can try using a breed of grass that grows well in the shade. Grass such as Rye and Tall Fescues are perfect for this type of lawn-growing challenge.

While waiting for that grass seed to grow, here are some tips on how to keep birds off a seeded lawn. After all, those Pesky critters can remove your seed before it even gets started!

3)  Water New Grass Seed Correctly

How often do you water grass during its growing season?  Grass (as with most other plants) needs enough moisture even to be able to sprout and get an opportunity to grow.

The flip side is if there is too much moisture, the seed is liable to rot and die or not root correctly.

We recommend watering newly planted grass seeds every day for no more than 10 minutes per zone.

Once the grass has germinated (sprouted) – increase the watering schedule to 2 times per day, early morning and late afternoon, at 15 minutes per zone.

This schedule will ensure the roots stay moist and the sun is not drying out the grassroots before they can develop.

It’s important to remember that once your lawn is fully grown-in, Daily watering is not recommended by professional growers, as this steady watering encourages shallow grassroots.

Instead, twice-weekly watering encourages roots to dive deeper, searching for water and encourages drought-tolerant roots.

4) Plant Grass Seed At the Correct Temperature

Temperatures are a massive factor in the ability to get an immaculate lawn. Of course, it can’t be too cold. Otherwise, the ground is barren, and the grass won’t grow. But it can’t be too hot either.

Grass seed grows best when the outside temperature is between 55-75 degrees Fahrenheit.

5)   Oxygen

There is a reason we aerate our lawns every year. That reason is simple; plants need oxygen too – although not for the same reason we need it. The oxygen helps to keep the grassroots healthy and able to grow stronger.

Once you get your Grass in full gear, you’ll need a great mower to keep it healthy.  These are some of the best gas self-propelled mowers to consider.

6) Use Starter Fertilizer

New grass seed needs a lot of nitrogen to grow.  Some of this is available naturally, but you should use a lawn starter fertilizer to boost your new grass seed.  Starter fertilizers such as this highly-rated one from Scott’s provides the trifecta of nutrients.

These come in the form of Nitrogen – Greener Grass, Phosphorous – Stronger roots, and Potash – disease resistance and healthier grass.

Common Mistakes Growing Grass


Growing the perfect lawn requires dedication, and most people have that dedication. For the most part, homeowners fall into other traps when tending to their new lawns.  Some owners wonder if you can plant grass seed on an existing lawn. Short answer, Yes. 

If you choose to hand toss grass seed – or overseed- just make sure you keep the seed moist for 7-10 days.

People make many mistakes when they first start trying to maintain their lawns, from too much watering to cutting it too short and so much more in between. But we are here to help you avoid these lawn care blunders:

1) Planting The Wrong Type of Grass (for your region)

The number one issue I have come across when helping people redeem their lawns is they choose to purchase the incorrect breed of grass seed.

It is also a complete time waster and a severe money pit too. Imagine spending hundreds of dollars on seeds, soil, equipment, and hours on manual labor, only to find out your return on investment is ZERO.

Everybody wants that luscious, thick Bermuda Grass, but not everybody lives in the right area to have that.

When in doubt – You can go with a “Combination” Grass seed, starter fertilizer, and mulch mix – Like this one from Pennington Seed

You must select a grass breed that grows well in your home climate. You must adapt to your grass region, not the other way around.

If you’re unsure about what type of grass seed to grow – Use this handy zone map to determine the best type of grass seed for your region.

Video:  “How to choose the right Grass Seed for your region”:

[youtube https://www.youtube.com/watch?v=9VhWtz6Iyq8]

2) Disregard Seeding Recommendations

This was my first problem initially, so I’m sure many of you have this same issue. More seeding doesn’t necessarily mean more grass. So be sure to plant the right amount of grass, but not too much.

Some people mistakenly throw new grass seed on top of new topsoil and fail to tilt the new grass seed into the soil.  Tilling protects grass seeds from drying out while germinating.

Overseeding (casting grass seed onto an established lawn) is possible and reasonably practical, but only if you maintain a moist established property. The existing grass blades will shade new grass seed as its roots grow.

3) Seeding At The Wrong Time

When you purchase grass seed (and soil for that seed), you are highly motivated to get out there and make your lawn beautiful.

I don’t blame you, but if the time of year isn’t right for seeding, you should not start seeding.

Think of it in the context of farming. There is a season for oranges, apples, strawberries, and anything else grown. If you plant the crop at the wrong time of year, you come away with nothing.

But if you wait until the moment is correct, you’ll come away with untold riches when it’s time to harvest that crop. Or at least some fruit for the spring.

Seed your lawn when it’s the right time. For much of the country, that’s only in the spring or Fall months.

4) Using Weed Treatment When Seeding

This is a big fat DON’T DO when you are starting your lawn from scratch. Understandably, you want to ensure you don’t have weeds in your yard while planting your grass.

Weeds dominate the nutrients around them and keep the grass from reaching its full potential.

While weed treatments like roundup kill weeds before they even get there, they also do another devastating thing. They kill your grass before it even has the opportunity to sprout.

This is because weed treatments work by preventing the germination process. Sounds good, right? The problem is these chemicals can’t distinguish between grass and weeds. It just attacks everything.

The rule of thumb when planting new grass is to abstain from using weed treatment for at least 12 weeks after seeding the yard.

Know when is the best time to fertilize a lawn
Knowing when is the best time to fertilize your lawn will help keep your grass weed-free.

5) Failure To Test the Soil

Like anything else that grows out of the ground, the conditions must be nearly perfect for the grass to grow and reach its full potential. That means sunlight, water, and, yes, dirt.

If your soil doesn’t match the soil needed for the grass to grow, then the grass won’t grow.

The proper pH balance is the basis of a healthy lawn. Finding the right balance in the soil can make all the difference in the world when you try to get your new lawn up to par.

If you have followed the proper grass seed and watering protocol, the temperature is perfect, and you still can’t seem to get your lawn to look the way you want, then you might want to have someone come to test the soil for you.

How To Speed Up Germination 

We’ve looked at the needs of your lawn and also went through the pitfalls that many people fall victim to when starting a new lawn.

But there’s more to lawn care than what not to do. There are also some pretty effective methods to help your grass in its quest for adulthood.

Regarding improving germination time, check out our post: How To Grow a Lawn Fast!

1) Plant Grass at the Optimal Time

The opposite of planting grass at the wrong time is doing so at the right time. If you have cool-season grass, plant it in cooler temperatures. And if you have warm-season grass, I’m confident you know where I’m going with this.

The best temperature for growing grass seed is 60-75 degrees Fahrenheit, with soil temperature ranging between 50-65 degrees.  While this is the ideal temperature range, grass will grow in slightly colder or warmer temperatures, but the germination process will take longer, and grass seed growth may be less successful.

Most of you reading this will want to plant in the fall. The cooler weather makes it easier for seeds to retain moisture. Do you know how we dehydrate more quickly in the summer months? Well, so does grass.

Another plus for off-season grass seed planting is that the vast majority of weeds that grass competes with die during these cooler months. Also, it isn’t as rainy as in the spring. Just because those April showers bring May flowers doesn’t mean they bring grass.

2) Use Starter Fertilizer With Grass Seed

While planting grass seed, “add” starter fertilizer by creating a mix (the recommended seed ratio to fertilizer), and rake the mixture into your topsoil.  Starter fertilizer provides the added “boost” of nutrients that a new lawn requires to get a jump start. Perhaps the best starter fertilizer you can buy is this one from Scott’s.

3) Provide Steady Watering

A regular daily water diet will help keep your grass on track to sprout and become healthy. Be careful not to over-saturate the lawn with water. Just keep it moist, usually about 10 minutes at or before dawn and a couple hours before dusk.

Light watering should suffice in cooler months. The warmer it is, the more often you should water. Also, shaded areas won’t need as much water as those spots taking full heat from the sun.

3) Use Mulch or Straw to Keep Grass Seed Moist

I’m sure you’ve seen yards with straw covering the entire yard. This is done to help the new grass seeds to retain their moisture.

Putting a thin layer of straw, mulch, or even some manure (a less appealing option) over your freshly seeded landscape can go a long way to helping your grass grow faster.

Once you have your new lawn in place, you may find a few “bumpy spots” – and if you find some, circle to this article: How To Fix a Bumpy Lawn – with Quick tips to save you some headaches later!

Grass Seed Mats – If you’re short on time, consider an All-In-One Grass Seed Mat.  The same rules apply, the right temperature, rake, and prep soil, but in this case – roll the seed mat out and water short amounts 2-3 times a day.  Now you’ve got a fully protected growing environment – to keep grass seed moist and grow grass seed fully in about five weeks.

To check out “Grotrax” Seed Mats in Various Width and Lengths at Amazon

4) Stay Off The Grass

You will have to be a little more engaged if you have kids or pets. You may have to watch your grass.

Keep animals and children off the lawn while the seeds are still growing. They’ll have plenty of time to play in the grass when it’s fully grown and healthy.

While waiting for the grass to grow in, check out this hands-on DIY article: “how to get rid of ants permanently.”  

Planting a  new Lawn from Grass Seed Video:

[youtube https://www.youtube.com/watch?v=KRBmLcjezFU]


Here’s an interesting fact I learned recently, a 50’ x 50 fully green lawn creates enough oxygen to sustain a family of four.

It may very well be why people living near grass lawns appear happier! It certainly isn’t unreasonable to believe that a green lawn, giving off ample oxygen, is a foundation for a productive life.

We know it isn’t easy to start a lawn from scratch, it takes time, patience, effort, and knowledge.

You’ve got the knowledge to keep your lawn fresh and flawless. Now all you need is the will (and the patience) to make it happen.

It will certainly take some practice, but after a few attempts, you’ll win the neighborhood lawn of the month EVERY MONTH.  Remember to provide your lawn with good Aeration at least once a year to provide more oxygen, nutrition, and water to the roots.

References & Further Reading

Kevin is the author and editor for Best Home Gear. In addition to his work in publishing, Kevin enjoys exploring the Outdoors in Michigan and Arizona, Hiking, Cycling, Fishing, Reading, and Completing Projects for Home and Garden.

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