Ornamental grasses are not true grasses, but instead are relatives of the true grass family, Gramineae. Many different species of ornamental grasses exist, nearly all of which are extremely adaptable, tolerant of poorer soils, and low-maintenance. Ornamental grasses come in a wide range of heights, textures and colors. You can use ornamental grasses for many different purposes in your landscape, from specimen plantings, borders, beds, erosion control, and hillside plantings, as well as ground cover plants.
Water your ornamental grasses in the first year after planting them deeply and thoroughly one to three times per week during the spring, summer and early autumn, depending on the plant species. Water established ornamental grasses once per week only during times of drought or prolonged dry spells.
Feed your ornamental grass once each year in early spring with 1/2 to 1 lb. of 10-10-10 NPK fertilizer per 100 square feet. Select a slow-release fertilizer and water it in thoroughly.
Remove weeds from around the ornamental grass by hand-pulling or hoeing once every week or two. Alternatively, you can spread a 2- to 3-inch-thick layer of mulch around the ornamental grasses to control weeds and preserve soil moisture.
Cut back the ornamental grasses to about 4 to 6 inches above the ground level in spring, just before new growth begins.
Treat your ornamental grasses for the occasional pest, such as mites or aphids. Spray the grasses with a forceful stream of water from a hose to knock the insects off the plants.