I admire this bold planting in the above photo of Nassella tenuissima (formerly Stipa tenuissima), just one block away from our nursery. This grass is commonly known as ‘Mexican Feather Grass’ , and I have referred to it as ‘Tina Turner’s Hair’ . Just so you know, it is sometimes  a short-lived perennial .  Adult plants usually last (or look good) for about three years, and self-sow freely to replace themselves. They require full sun and good drainage.  Soil can be poor (they grow in almost anything), and watering is not really necessary .
Masses of grasses give a ‘hip’ look to contemporary gardens. I am noticing more municipalities (especially Surrey and Langley, B.C.) are doing a fabulous job on their highway median plantings by repeating  grasses in bold groups.  You may have spotted Calamagrostis  ‘Karl Foerster’ standing impossibly vertical about town. This subtle 6′ clump suddenly steals the show when its ram-rod straight flowering stalks dry to a pale brown armful. The more of these plants you see together in a design, the better the visual impact is.  The grass ‘craze’ seemed to be over….. one of this, one of that….forget it.  Be bold – plant masses- and both you and your garden will look ten years younger !