What Taller Ornamental Grasses Do for the Garden
Ornamental grasses are one of the most versatile plant categories available for full sun landscapes. They contribute movement, texture, and seasonal color from spring emergence through winter, when their seed heads and dried foliage remain standing and provide structure in an otherwise bare garden. Many varieties offer significant wildlife value, feeding songbirds through fall and winter and providing shelter for ground-nesting species.
Sizes in the ornamental grass category range from six-inch miniatures to specimens reaching eight to ten feet. Blade color spans the full range from steel blue and chartreuse to deep maroon, variegated cream, and warm tan. These plants perform across a wide range of landscape applications: mixed perennial borders, mass plantings for erosion control, containers, meadow gardens, and specimen placements where bold scale is the goal.
The varieties covered below focus on taller, sun-loving selections suited to the Mid-Atlantic region. Most are drought tolerant once established, deer resistant, and require minimal maintenance beyond a single annual cutback in early spring.
A Note on Pruning Timing
One of the most consistent mistakes with ornamental grasses is cutting them back in fall. For most species, fall cutback combined with wet winter conditions promotes crown rot. The correct approach is to leave grasses standing through winter, allowing them to provide wildlife habitat and garden structure, and cut them back to six to ten inches in early spring before new growth begins. The single exception noted below is for cool-season grasses, which have different timing needs.
Panicum virgatum (Switchgrass)
Switchgrass is a warm-season native that was historically a dominant species across the tall-grass prairies of North America. It provides critical winter cover for birds and its seeds are consumed by a wide range of songbirds through fall and winter. Deep, fibrous roots extending five to six feet make it one of the most effective grasses for erosion control available. It performs reliably in full sun across a wide range of soils including clay, tolerates black walnut toxicity, and grows well in both moist and dry conditions.
Switchgrass should be pruned to eight to ten inches in early spring rather than fall. It is hardy in zones 4 through 9 across all cultivars listed below.
Notable cultivars:
'Shenandoah' emerges green in late spring and transitions to a rich reddish-maroon by midsummer, one of the strongest red tones available in the switchgrass palette. Airy seed panicles held above the foliage persist through fall and winter. Grows approximately 4 feet tall by 3 feet wide.
'Heavy Metal' is strongly upright with metallic blue-green blades that hold their vertical form through the season without flopping. Light seed panicles appear in midsummer. Grows approximately 5 feet tall by 3 feet wide and makes an excellent vertical accent.
'Northwind' is the most columnar of the switchgrass cultivars, with upright blue-green blades that remain vertical even through wind and snow. Tan seed heads develop through the season. Grows 5 to 6 feet tall by 3 feet wide and is one of the best choices for a narrow vertical statement.
'Dallas Blue' offers blue-green foliage in an upright to vase-shaped form reaching approximately 6 feet tall. Mid-summer seed panicles are light brown and the plant maintains its structure reliably through wind and rain.
'Purple Tears' grows to approximately 4 feet with seed panicles that emerge soft gray and open to purple-hued heads. When planted in mass, it creates a distinctive smoky or hazy effect through the bloom period.
'Cloud Nine' is the tallest commonly available switchgrass, reaching approximately 8 feet with bluish-gray blades, light tan panicles, and golden fall color. Its airy open form moves beautifully in a breeze and serves as an excellent backdrop or structural anchor for large borders.
Miscanthus sinensis (Maiden Grass / Chinese Silver Grass)
Miscanthus is native to Asia and widely grown for its ornamental value, large size, and showy plumes. One important consideration for the Mid-Atlantic region: some Miscanthus varieties reseed readily and are listed as invasive in certain states. Gardeners concerned about reseeding should select late-blooming or sterile cultivars, as breeders have developed infertile selections specifically for this reason.
Miscanthus performs best in full sun with moist, well-drained soil. Like switchgrass, it should not be cut back in fall. Wait until early spring to prune to eight to ten inches.
Notable cultivars:
'Bandwidth' is an infertile selection with distinctive gold banding on its blades and late-summer bloom. Upright at approximately 3 feet tall, it provides reliable late-season color without reseeding concerns.
'Purpurascens' is one of the strongest performers for fall color in the genus. It grows upright to approximately 5 feet and produces exceptional red foliage from late summer into fall that persists for eight to ten weeks. Hardy to zone 4. Not drought tolerant and requires consistent moisture.
'Adagio' offers a refined texture with narrow green blades and tan-beige inflorescences in summer. Grows to approximately 4 feet tall with a rounded form that works well in formal or structured garden settings.
'Gracillimus' has fine green blades and a rounded, graceful form reaching approximately 6 feet at bloom. It is a late bloomer, often not flowering until mid-September, with reddish seed heads that persist through fall. Requires full sun and moist, well-drained soil.
'Morning Light' is one of the best-known Miscanthus cultivars. Its narrow foliage has fine white margins that create a shimmering silver effect in the landscape. Reddish flowers appear from late summer and the plant grows to approximately 6 feet including bloom. It tolerates light shade and performs well in large containers as well as garden beds.
'Zebrinus' features distinctive yellow horizontal bands across its blades and reddish-brown flowers in September. Reaches approximately 8 feet including bloom. Full sun is required for the best color development; the banding diminishes in shade.
'Cabaret' is one of the most dramatically variegated selections available, with wide leaves carrying bold white bands along the center. It requires a long, warm season to flower and blooms in late September. Grows to approximately 9 feet and is hardy to zone 6.
'Strictus' (Porcupine Grass) shares Cabaret's variegation pattern but projects its blades outward from an upright central structure, creating a distinctive silhouette resembling quills. Reaches approximately 9 feet and blooms in September. Hardy to zone 5.
Pennisetum (Fountain Grass)
Fountain grasses are among the most recognizable ornamental grasses available, with their characteristic arching form and bottlebrush plumes in tan, pink, black, or white. They mound attractively with blades and plumes rising above in tiers. Most selections prefer full sun to part shade. An important note: hardiness varies significantly within this genus. Some species are reliably perennial in the Mid-Atlantic, while others are grown as annuals. Verify hardiness at point of purchase before assuming a Pennisetum will return the following year.
Leave foliage standing through winter and prune to approximately six inches in early spring. Fountain grasses tolerate wet soils, drought, black walnut, and air pollution, and are useful for erosion control.
Notable selections:
P. alopecuroides 'Little Bunny' is a true dwarf growing to approximately 1 foot tall with light tan bottlebrush plumes about 1 inch in length. Bright green blades turn tan in fall. Seeds are eaten by birds. Hardy in zones 6 through 9.
'Burgundy Bunny' grows to approximately 1.5 feet tall by 2.5 feet wide with green blades that develop burgundy highlights and turn fully burgundy in fall. Small white plumes appear in summer. Tolerates sun to part shade. Hardy in zones 6 through 10.
'Hameln' is one of the most reliable perennial fountain grasses for the Mid-Atlantic, growing approximately 2.5 feet tall and wide with tan plumes in late summer and yellow-to-brown fall color. It stands through snow for winter interest. Hardy in zones 5 through 9.
P. orientale 'Karley Rose' produces soft pink plumes from summer through fall on a plant that arches to approximately 3 feet wide with plumes reaching 3 feet tall. Hardy in zones 6 through 8.
P. alopecuroides 'Red Head' is a larger selection with red-tinged plumes held above a 4-foot by 4-foot clump. The plumes work well fresh or dried. Prefers full sun and moist soil.
P. setaceum 'Rubrum' is an annual in zones 9 and 10 in the Mid-Atlantic but is grown as a striking seasonal performer for its deep red-burgundy foliage. Grows 3 to 4 feet tall and wide and performs best in containers in full sun.
P. setaceum 'Fireworks' is another annual selection with arching blades in a blend of green, burgundy, pink, and white. Grows approximately 3 feet tall and is excellent in containers in full sun with moist soil.
Festuca (Blue Fescue)
Blue fescues are cool-season grasses that form tight mounds of narrow blue-gray blades with a fine texture that contrasts beautifully against broader-leaved plants. They dislike overwatering and hot, humid conditions. Site them in full sun with good air circulation and afternoon shade where possible in warmer exposures. Both selections below are evergreen and remain attractive through winter.
'Elijah Blue' forms a tight mound to approximately 12 inches with blue seed heads in early summer. Requires well-drained soil and performs well in containers.
'Cool As Ice' mounds to approximately 10 inches with similar coloring and slightly better humidity tolerance than 'Elijah Blue'. Blue seed heads appear in early summer and it is particularly well suited to container plantings.
Andropogon gerardii (Big Bluestem / Turkey Foot)
Big Bluestem is a warm-season native clumper that was the signature grass of the North American tall-grass prairie and remains one of the most ecologically valuable ornamental grasses available. It grows 5 to 8 feet tall with blue-green blades that turn burgundy, copper, and yellow in fall and remain upright and attractive through winter. The distinctive three-part seed head resembles an upside-down turkey foot, which gives the plant its common name.
Big Bluestem tolerates both moist and dry soils, provides excellent wildlife cover, and its seeds are valuable food for a range of bird species. It is one of the strongest choices for a native meadow planting or naturalized area in full sun.
Arundo donax (Giant Reed Grass)
Giant Reed is a large-scale grass that forms an effective screen or privacy border within three seasons, reaching 12 to 14 feet tall and wide. Seeds develop only in warmer climates, limiting its invasive potential in the Mid-Atlantic. The variegated form 'Variegata' offers cream-striped blades and is hardy to zone 6. It tolerates a wide range of conditions from wet to dry and performs in full sun to very light shade. Historically, Arundo donax has been the primary source of reeds for woodwind instruments.
Chasmanthium latifolium (Indian Wood Oats / River Oats)
River Oats is a native grass that bridges two difficult garden situations: it thrives in both moist shade along stream banks and in dry shade, and it tolerates black walnut toxicity. It grows 2 to 3 feet tall with blue-green blades and develops distinctive oat-like inflorescences in midsummer that nod gracefully on arching stems. The seed heads turn copper-brown in winter and remain attractive in snow.
River Oats is a valuable wildlife food source and is effective for erosion control near water. One management note: it reseeds aggressively in favorable conditions. Deadheading before seed maturity or removing seed heads after the first year prevents unwanted spread. Prune in spring before new growth emerges.
Cortaderia selloana (Pampas Grass)
Pampas Grass is a South American native valued for its bold scale and the large, silky plumes it produces in late summer and fall, which are popular in fresh and dried arrangements. It reaches approximately 10 feet tall in full sun with moist, well-drained soil and is drought tolerant once established. In the Mid-Atlantic, it is not reliably perennial through cold winters and is best treated as a long-season annual or overwintered with protection. Hardy to approximately zone 8.
Deschampsia cespitosa (Tufted Hair Grass)
Tufted Hair Grass forms a clump of dark green basal blades with delicate, airy panicles that emerge green in June and turn gold as the season progresses, reaching approximately 4 feet including bloom. It is long-lived, adaptable to a range of soils, and performs in full to part sun. Hardy to zone 4, making it one of the more cold-tolerant options in this category.
Eragrostis spectabilis (Purple Love Grass)
Purple Love Grass is a native of sandy soils that produces billowing mounds of blue-gray blades topped with arching purplish-pink flower clusters beginning in late August. The effect is light and airy, resembling a cloud of color above the foliage. It grows to approximately 2 feet overall, requires sharp drainage particularly through winter, and is useful for bank stabilization. Hardy to zone 5.
Helictotrichon sempervirens (Blue Oat Grass)
Blue Oat Grass is a cool-season grass with larger, thicker blades than blue fescue, offering a bolder statement in the blue-gray palette. Hardy in zones 4 through 8.
'Sapphire' grows 2 to 3 feet tall and wide with tan seed heads in early summer. It requires well-drained soil and full sun, with some afternoon shade beneficial in humid summer conditions.
Muhlenbergia capillaris (Pink Muhly Grass)
Pink Muhly Grass is a native of sandy and rocky soils that produces one of the most dramatic seasonal displays of any ornamental grass. Beginning in September, clouds of pink to pink-red panicles billow above the dark green glossy blades and persist through November, creating a late-season color display when most other plants have faded. It grows to approximately 3 feet overall in full to part sun. Hardy to zone 6 but will not tolerate wet winter conditions.
Nassella tenuissima (Mexican Feather Grass)
Mexican Feather Grass produces extremely fine, hair-like blades with feathery tan inflorescences that move with even the slightest breeze. The effect is soft, flowing, and unlike anything else in the ornamental grass category. It thrives in full sun to light shade on dry sites in well-drained soil. Hardy to zone 6 but will not tolerate clay, wet winters, or standing water against the crown.
Schizachyrium scoparium (Little Bluestem)
Little Bluestem is a native of tall-grass prairies and open woodlands that is among the most ecologically valuable ornamental grasses for the Mid-Atlantic garden. Its fine-textured blades shift from green and blue-green through the growing season to magenta, copper, and deep red in fall, a color change that intensifies with cold temperatures and persists through winter. It grows 2 to 4 feet tall in full sun with well-drained soil and is one of the best native grasses for supporting songbirds, whose seeds it produces in abundance.
Sorghastrum nutans (Indian Grass)
Indian Grass is a warm-season native that was the second most prevalent grass across the North American tall-grass prairie. It grows upright to approximately 5 feet, reaching 7 feet in flower, with thin green blades that turn golden orange in fall. The showy plumes with yellow anthers appear in August and make excellent dried material. It handles a range of soil types including clay, tolerates full sun, and provides significant wildlife value. Prune to 6 to 8 inches in early spring.
Sporobolus heterolepis (Prairie Dropseed)
Prairie Dropseed forms fine-textured mounds of threadlike blades that are a glossy green through summer and transition to deep copper-orange from late September through winter. Seed heads rise above the clumps from late August into September and are particularly attractive to migrating songbirds. It is slow to reach mature size but exceptionally long-lived once established, and is among the most drought-tolerant native grasses available once the root system is developed.
Designing with Taller Ornamental Grasses
Ornamental grasses generally show their best characteristics when planted in small masses of three or more rather than as isolated specimens. Grouping the same variety allows the movement, color, and seasonal interest to register as a cohesive element in the border rather than a single plant competing with its surroundings.
For wildlife-forward gardens, native species including switchgrass, Big Bluestem, Little Bluestem, Indian Grass, and Prairie Dropseed provide the most direct ecological value. Their seed heads feed wild birds through fall and winter, and their dense clumps provide nesting material and ground cover for a range of species.
For more guidance on building a complete sun garden with grasses and perennials, The Mill's garden consultation service offers personalized plant selection and design support tailored to specific site conditions. The soil amendments collection and mulch and landscaping materials support the establishment and long-term health of new plantings.
Visit any local The Mill store to discuss ornamental grass selection, siting, and care with knowledgeable staff.
