Prairie dropseed is the most refined of the native grasses. Sporobolus heterolepis forms a tight emerald fountain of threadlike leaves, 2 to 3 feet tall and wide, so uniform in shape that it reads as almost architectural, which is why designers plant it in rows along walks and in repeating drifts. Full sun, hardy from Zone 3 through Zone 9, and it takes three or four seasons to reach full size.
In late summer the flower panicles rise above the foliage in an airy haze, and they are fragrant, which is rare in an ornamental grass. The scent is warm and faintly spiced, strongest on a still evening, and noticeable from a few feet away.
Fall turns the foliage gold and orange, fading to light copper through winter, and the fine texture holds up under snow better than heavier grasses.
Prairie dropseed is a deep-rooted prairie species and wants full sun, lean soil, and good drainage. It is slow to establish and long-lived once it settles, essentially permanent in the right spot. Space plants 2 to 3 feet apart to let each clump keep its shape. Deer leave it alone.