Perennial Ornamental Grasses for Sale Online. If you’re seeking robust, affordable ornamental grasses for your landscape or garden, turn to Greenwood Nursery. Perennial grasses will provide a low-maintenance splash of color and foliage to your landscape or garden. These easy to grow plants thrive in many different environments and climates, making them extremely versatile and a wonderful addition to any landscape. Now available, Pampas Grasses. Favored for their soft, flowing appearance many ornamental grasses actually make a pleasing rustling sound in the breeze and other varieties give off a sweet scent, making them popular among gardeners who are looking to add a bit of personality to their outdoor spaces. We offer many varieties of tall ornamental grasses, including favorites such as pink muhly grass, Karl Foerster grass, morning light miscanthus grass, Pampas grass and as well as low growing ornamental grasses like Hameln, Little Bunny, Boulder Blue and Elijah blue festuca grass. While most perennial grasses prefer at least 6 hours of sun a day, some are more flexible and will get by on less. Medium growing grasses like the HamelnGrass, Karl Foerster Grass or Karley RoseGrass can be spaced 18 to 24 inches apart. Small ornamental grasses like the Acorus Ogon, Black Mondo Grass and Prairie Dropseed grass can be planted much closer, even spacing 4 to 8 inches apart. The taller varieties such as the Miscanthus Adagio, Miscanthus Gracillimus, and the Miscanthus Morning Light can be spaced anywhere from 2.5 to 3 feet apart.