Are you looking to germinate grass seeds and don’t know what temperature is best? Maybe you have had no success with grass seeds in the past and want to try again?
Or are you curious about grass seed germination and want to know more? Regardless of the reason that brought you here, we have the answers for you!
Finding out the best temperature for grass seed germination can be tricky, especially if you are new to the world of grass seeds. You head online for some advice but are met with pages and pages of contradicting advice.
How are you supposed to know who to trust or what temperature is best for your grass seeds?
Well, we are here to put a stop to the confusion! Keep reading to find out what the best temperature for grass seed germination is and everything you need to know about them.
When To Plant Grass Seeds
Knowing when to plant your grass seeds can be tricky, especially if you have never planted them before. You might be surprised to know that not all grass seeds are the same, and will need to be planted at different times of the year and in different conditions.
Before planting your grass seeds, we recommend reading the packet to check for any advice. Usually, when you purchase grass seeds, their packaging will indicate what type of grass seeds they are and whether or not they need to be planted in certain conditions or times of the year.
Timing Matters!

When planting your grass seeds, you must consider the planting season and the growth period of your seeds. As we mentioned earlier, different types of grass grow better in different seasons. You want to give your grass the best chance possible, so should plant it at the optimal time!
Some grass seeds germinate and grow better during hot weather, while others can grow better during colder weather. It’s why we recommend knowing your seeds before planting them so you can adjust the time they are planted accordingly.
If you can take advantage of your grass type and its natural growth pattern, you can germinate the seeds quicker. This ensures they will be healthy and survive! It also decreases the chance of dead patches on your lawn, what a win!
Now, we know what you are thinking, when should I plant my grass then? Well, after checking if your grass seeds will grow best during hotter or colder weather, you can keep reading to see the optimal temperature for grass seed germination!
What Is The Best Temperature For Grass Seed Germination?
Let’s dive into what brought you here! The best temperature for grass seed germination depends on the type of grass seeds that you have. Whether you have seeds for the cool or warm grass season, you should avoid planting them at peak points of any season.
For example, you should not plant cool weather seeds during the middle of winter and warm grass seeds should not be planted at the height of summer. The weather at these times can be harsh for seed germination and growth, and will likely result in poor germination.
Instead, you will want to plant them earlier in the season when the weather is kinder to seeds. Don’t worry, we will break down the best time of year and temperatures to plant grass in cool and warm seasons!
Cool Grass Seasons
Starting with cool grass seasons. These seeds should be planted during the Fall when the weather is generally quite mild. You should aim to plant your seeds when the temperature is between 50 and 65 degrees Fahrenheit.
To check the temperature, we recommend using a soil thermometer. These can be purchased at your local home or gardening store, or they can be found online.
Of course, you also need to consider your climate. For some of you, cool-season grasses should be planted at the beginning of fall, whereas others can be planted closer to winter. It depends on when you typically see temperatures of 50 to 65 degrees Fahrenheit.
If you live in colder climates, plant your cool grass seeds at least 45 days before the first frost. This allows your seeds plenty of time to germinate and grow before the soil becomes too wet for them.
Warm Grass Seasons
Warm grass season seeds are best planted in spring. The best temperatures for these are between 65 to 70 degrees Fahrenheit. You get a much smaller frame to work with for grass seeds in the spring, mainly due to rising temperatures.
Warmer weather can dry out the soil, making it hard for seeds to germinate and get the nutrients they need. Combined with lower levels of rainfall, grass seeds planted in warmer weather can struggle to grow.
Make sure you have enough rain to create the moisture your seeds need. You can create moisture yourself by watering the seeds if you find your spring unexpectedly dry. Warm-season grass seeds need to be planted in the spring to get the right level of moisture and heat to help them grow.
We find it far easier to give your seeds moisture than heat. Plant them in the spring and if you find it drier than normal, water your seeds daily to provide them with the moisture they need.
Know Your Grass!
To guarantee success when germinating your grass seeds, you need to know your grass seeds. Spend some time researching grass seeds before parting with your cash. That way, you know what seeds will be successful in your climate and when to plant them!
There are lots of helpful guides and forums online that can provide you with the information you need. The packet of your grass seeds is also full of information for you to utilize!
Scan the packet to see what season they are best planted in and if they prefer warm or cool temperatures. This will help you decide if they are the right seed for your climate.
Sure, it might seem boring reading through the fine print, but it’s worth it if you want a healthy lawn!
Final Thoughts
And there you have it! Depending on the type of grass seeds you have, the best temperature to germinate grass seeds is between 50 and 70 degrees Fahrenheit. Be sure to check whether your seeds are cool weather or warm weather seeds to know when the best time to plant them is.
Don’t forget to invest in a soil thermometer to help you accurately determine the temperature of your soil and know when is best to plant and germinate your grass seeds