Prairie blue-eyed grass isn't actually a grass, it's a member of the iris family. It's a short, compact plant that can be used in borders or in dry, sunny beds with other low-growing plants. After 2 to 3 years, this easy-to-grow plant can be divided. Uses: borders, pollinators, butterfliesBloom time: May - JuneHeight: 10 to 14 inchesSpace: 6 to 12 inchesSun: Full sun to medium shadeMoisture: Dry to average