Grass Seed Germination – How Long Does it Take?

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Grass seed germination depends on the type of seeds you have planted. Are they a mixture? Or are they either warm-season or cool-season grass seeds? Either way, a fair range for grass seeds to germinate can be anything between 5 to 30 days. High-end grass seed mixtures may take substantially longer than a single type of seed plantation.

Grass Seed Germination: How Long Does It Take?

grass seed germination

Even your region of residence, soil type, weather conditions, frequency of watering, and whether you are reseeding or planting seeds for the first time matters.

Most importantly, most seed sacks consist of seed mixtures. The individual constituents of these mixtures will decide the speed at which your seeds germinate.

How Long Does it Take for Different Grass Seed to Germinate?

The time period for grass seed germination varies on the grass seed type. 

  • Common seed mixtures such as perennial ryegrass and tall fescue take about 12 to 14 days to germinate.
  • Perennial Rye grass will take only 3 to 6 days to germinate.
  • Kentucky bluegrass can take 2 to 4 weeks to germinate and requires extra maintenance in the initial stages.
how long it take for grass seed to germinate
  • Centipede grass type can take about 5 to 7 days to germinate.
  • St. Augustine is super hard to get to sprout by an average gardener. Consider using sod or plugs for these seeds. This grass type can begin to germinate within 7 to 14 days.
  • A maximum of 30 to 35 days must be allowed for any of the above grass types to grow fully.

What Restricts Seed Germination?

Seed germination can face obstruction due to factors that are in your control and also some that are not. 

  • The soil temperature or air temperature may be too cool or warm. Even your soil moisture maybe not enough or too much for your seeds. You may notice patches of germinating seeds whereas some would be growth-less. This can happen due to partial sunlight on one part of your garden. 
grass seed germination

Even inefficient sprinkler systems can prove to distribute water in a scattered manner, eventually proving ineffective for grass seed germination.

grass seed germination
  • In a haste, some gardeners may not create a perfect seedbed. It can be uneven due to some areas being too thick and some being too shallow. One needs to ensure that all the seeds are rolled into the soil for an even grass seed germination pattern. 

Don’t put thick layers of compost above the soil. Keep in mind that seeds are delicate when planted, all actions related to nurturing have to be done in moderation. Raking, watering, soil leveling, fertilizing – all actions must be performed gently.

grass seed germination
  • If you live in a region that receives plenty of rainfall then you may not need to water your grass seeds often. But if you receive no rainfall then use a backpack sprayer or garden hose to water them at least twice a day for the first few days.

Lack of water will deprive the seeds of a route to collect and store essential nutrients. Consider attaching an oscillating sprinkler system that comes with a fully programmable timer.

  • Planting your seeds extra deep into the soil is a sure-shot way to deprive them of nutrients. Typically, 1/4th of an inch is considered an appropriate depth to plant grass seeds. Also, remember to keep the soil loose so that water can easily seep through for grass seed germination to occur smoothly. 
grass seed germination

Consider using a rake before and after planting the grass seeds. A garden surface with pores will help tackle and regulate all the issues mentioned above.

  • Often people have grass seed sacks lying in their shed. Months and even years pass till they actually decide to put these seeds to use. The problem lies in the ignorance of the bag label. If the seeds have aged then the odds are they will not grow, irrespective of growth fertilizers, soil type, or ideal weather conditions. 
how to germinate seed in grass

You can conduct a test to figure whether successful grass seed germination will occur or not. Simply place a wet paper tissue in a cup. Put a few seeds in the tissue and wrap this cup in a plastic bag. Provided you see traces of germination, the seeds are considered healthy and will germinate.

germinating seed in grass

In case you seem to be using more than the required seed quantity and are noticing fewer germinating seeds then your seeds are probably old.

What is Seed Germination?

Seed germination refers to the action of your seed being transformed into a plant, although in its initial phases. The water poured over these seeds is stored via a process known as imbibition. Enzymes within the seed are activated and the seeds begin to sprout. 

grass seed germination

Although the roots of the seeds sprout first. This helps in water transfer from the soil, only then it sprouts out of the garden surface.

How Should I Maintain New Grass Seeds?

Maintaining new grass seeds can be an easy task if you perform the necessary actions before planting them. Even the first few days post-planting is highly critical for successful and timely grass seed germination.

  • Gardeners must use a garden hose and water the planned planting area at least a week in advance. Try and water the soil to a depth of at least 5- 8 inches. 

Worried about how to figure out the depth? You can make use of the screwdriver test to get a better sense of the depth. The lesser resistance you are facing, the more well-watered your soil is. 

germinating seed in grass
  • The moment you are done sowing your new grass seeds, instantly begin watering them. 10 minutes of consecutive watering will equip the soil and the seeds with sufficient water. Above all, this is a great way to moisture the seeding region from the very beginning.
  • As you already know, watering is crucial for grass seed germination. Watering during the early morning or post-sunset would be a wise decision. This is because the overall climate is comparatively cooler and the chance of water evaporation is much lower.
grass seed germination

In short, cooler the temperature, the more effective water absorption carried out by the soil.

  • Over-watering can create puddles and this leads to the seed getting choked under the soil. Due to a depletion in oxygen supply, the seeds can begin to rot and algae can grow. Thus, never over-water your grass in one watering session. 
grass seed germination

For successful grass seed germination, you need to spread out the watering cycle.

Tips and Tricks

1. Overseeding, or increasing the seed density in your garden could make it a survival battle for each seed. The smaller seeds will work extra hard to maintain a consistent intake of nutrients and this can hamper the growth. 

grass seed germination

Remember, overseeding doesn’t help in seed germination periods.

2. Reseeding, or placing additional seeds on an already grassy lawn is done to cover the patches where grass has stopped growing. Aesthetically these patches are negative. Even worse, these grass-deprived patches can spread all across your backyard and malnourished all the grass. 

grass seed germination


This is when over seeding works as some grass is already matured and your new seeds can easily absorb nutrients.

3. Always abide by the seeding rates mentioned on the label of the seed bag. Based on the seed species these rates will vary. Unless you are a professional gardener, don’t rely on sprinkling the seeds with your hands. There is a reason seed sprinklers are made, their accuracy being one of them.

germinating seed in grass

Following the seed quantity per unit area will help you achieve accurate germination dates.

4. Never let any of your seeds be exposed to the open once planted. Very often, wind and flowing water can displace your seeds from the area of plantation. As long as you rake the soil well and make sure the seeds are settled, no external factors can alter their location.

5. If you have a lawn that is visited by multiple birds then make sure to factor them in. Birds love picking on fresh seeds. You can install sensors in your garden that sprinkle water when movements are detected. Don’t worry, you can turn them off when you’re in the backyard. 

germination of seed in grass

Pets can also be left loose in the lawn to avoid birds from eating your freshly planted seeds.


You are now aware of factors that affect grass seed germination and approximately how long do some seed species take to germinate. Make sure to follow the maintenance and nurturing tips mentioned for best results.

Have you ever thought of grass-free backyard ideas?

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