Definition
"Blue grass" commonly refers to Kentucky bluegrass (*Poa pratensis*), a cool-season grass known for its bluish-green hue. The "blue" comes from the seed heads, which have a bluish tint before maturing. It's a popular choice for lawns and pastures because of its dense growth and ability to spread. However, it can also be invasive in some areas. Think of it as the popular kid in the grass world – widely liked but sometimes a bit too assertive.