Grass Seed Germination Temperature

Everybody wants a think, luscious, healthy lawn, however getting to that point isn’t always as easy as it seems. Not only does it take good equipment, but it takes perfect timing to plant your grass seed for optimal growth and health. In this article I’ll discuss the ideal grass seed germination temperature, so you don’t waste that expensive seed you purchased.

Here are some things to consider when deciding when to seed your grass.

Timing: When to Plant Grass Seed

Now, I know what you may be thinking, “Why does timing matter? Doesn’t grass grow the same all year long?”

The answer is no.

When seeding your grass, it is important to consider the planting season as well as the natural growth period of your seeds. Different types of grass grow better in different seasons.

While some grasses may seed and grow better during hotter weather, others may grow better during colder weather. It is important to know your seeds and know the type of grass you are growing so you can time your planting accordingly.

Taking advantage of your grass type and its natural growth patterns will help it to germinate more quickly, therefore giving you the best chance to live and be healthy. It will also decrease the likelihood that you will have dead patches in your lawn.

So now you know that timing is important, but you may be thinking, “So, when should I plant my grass?”

Grass Seed Germination Temperature (Cool Season Grasses)

Getting straight to the point, Fall is the best season to plant cool-season grasses. 

Cool season grasses will germinate best when evening temperatures are between 50 and 65 degrees Fahrenheit and day temperatures fall in the 60-75 degree range.

The best way to determine your soil temperature is by using a soil thermometer. You can order one online, or you can buy a soil thermometer at any local home improvement store.

Keep in mind when thinking about when to plant your seeds that where you live has a big effect on when you plant.

For some climates, you may need to plant your cool-season grasses at the beginning of the fall season. In other climates, you may have to wait a little longer and plant them closer to winter.

If you live in a colder climate, a good rule of thumb would be to plant your cool-season grasses at least 45 days before the first frost. This will give you seed enough time to germinate and grow before the soil gets too wet.

When to Plant Warm Season Grasses for Best Germination

Keeping it short, the best season to plant warm-season grasses is Spring.

Warm season grasses germinate best when daytime temperatures are consistently around 80 degrees and evening temperatures sit in the 65-70 degree Fahrenheit range.

It is best to plant in the Spring because of the balance between wet and dry. In the Spring, you have enough rain to create the moisture needed to germinate the seeds. You also, however, have the heat needed for your warm-season grass to thrive.

Do Your Research

Growing and taking care of your new grass is not hard if you have done your research. Before buying seed, make sure that you know what seed you’re buying and when it is best to plant it.

Now that you know the ideal grass seed germination temperature for your new seed, you will be ready to grow a healthy lawn!

Related: Help My Lawn is Nothing but Weeds!