Grass stops growing in the fall when temperatures consistently remain between 40-50 degrees Fahrenheit (5-10 degrees Celsius). While grass can actually grow right down to freezing air temperatures (albeit slowly), it grows much better above the 40-50 degrees Fahrenheit range.

How cold is too cold for grass seed?

If you’re wondering how cold is too cold for grass seed germination use our rule of thumb and check the weather reports. If the daytime temperature is below 60°F then soil temperature is below 50°F, making it too cold; if there is frost or still a danger of frost, then it’s too cold.

Will grass grow in cold weather?

Cool-season grasses have adapted to grow well in areas of the country that experience tremendous temperature fluctuations: cold, freezing winters and hot, dry summers. However, these grasses grow best when temperatures are between 60-75 degree F, which is why they grow most actively in the spring and fall.