• Many types of grass are blue or have blue accents.Christine Mariner / Design Pics/Valueline/Getty Images
  
  Most people associate grass and grassy plants with the color green, but many grasses are shades of blue. Blue grassy plants grow all across the world, and many are used as ornamental grasses in gardens and landscapes. Adding blue grasses to your garden is especially effective if you have many brightly colored flowers, as it creates a contrast.
  
  

Blue-Lyme Grass

• This grassy plant produces flat, steel-blue foliage and is native to the United States. Blue-lyme grass (Elymus arenarius) tolerates a wide range of soils from wet to dry and grows in either full sun or partial shade. When fully mature, this plant stands at heights between 3 and 4 feet. Blue-lyme grass grows in U.S. Department of Agriculture Plant Hardiness Zones 4 through 10. Cut back blue-lyme grass periodically. This plant can become invasive but can also be used for soil erosion control on embankments.
  
  

Sioux Blue

• Also known as blue Indian grass, Sioux blue is a member of the sorghastrum family and produces bright, grayish-blue foliage, mostly in late summer and fall. Sioux blue requires full sun and ample water, although it survives droughts and dry spells once established. This grass is native to North America where it grows in abundance. Uses are for naturalizing, wildlife, masses and drifts. Space Sioux blue plants between 24 and 40 inches apart for best results.
  
  

Blue Oat Grass

• This blue grass plant is native to the Western Mediterranean and meadows of Eurasia. Blue oat grass (Helictotrichon sempervirens) thrives in areas with moist, fertile soil and plenty of drainage providing full sun or partial shade. In mild climates, blue oat grass grows year-round. It can survive in U.S. Department of Agriculture Plant Hardiness Zones as low as 3. This plant's blue grass blades typically grow between 20 and 24 inches. The plants should spaced between 18 and 26 inches apart for best results.
  
  

Cox's Fescue

• Native to New Zealand, this blue grass inhabits mainly coastal ledges, ridgelines, rock stacks, cliff faces and peaty turf, according to the New Zealand Plant Conservation Network. Cox's fescue (Festuca coxii) grows in small clusters about 6 inches tall and 6 inches wide. To propagate this plant, simply grow it from fresh seed and give individual plants adequate room to grow. Plant Cox's fescue in areas with low humidity for best results.