Soil temperature plays a critical role in grass growth, as it affects the germination of seeds and the activity of plant roots. Here's what's happening with soil temperatures and grass growth now:

In the Northern Hemisphere, as of late March, soil temperatures are generally still on the cool side, as much of the region is transitioning out of winter. In many areas, soil temperatures are hovering around 40-50 degrees Fahrenheit (4-10 degrees Celsius), which is still too cold for optimal grass growth.

However, as temperatures begin to warm up in the coming weeks and months, grass growth will pick up. Cool-season grasses, such as Kentucky bluegrass and perennial ryegrass, will start to grow more vigorously as soil temperatures reach the range of 50-65 degrees Fahrenheit (10-18 degrees Celsius), while warm-season grasses, such as Bermuda grass and zoysia grass, will start to grow as soil temperatures reach 60-70 degrees Fahrenheit (15-21 degrees Celsius).

It's important for farmers and gardeners to monitor soil temperatures closely, as they can have a big impact on grass growth and development. Soil temperature can be measured with a soil thermometer or by checking online resources that provide soil temperature data for different regions. By understanding the relationship between soil temperature and grass growth, farmers and gardeners can make informed decisions about when to plant, fertilize, and manage their grasses.