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Prairie Dropseed

Sporobolus heterolepis (spor-OB-oh-lus heh-teh-roh-LEP-iss)

Family: Poaceae Native Herbaceous (3-15 ft)

Prairie dropseed, is a native perennial clump-forming, warm-season, ornamental grass that forms dense tufts of sprawling leaves up to 2 feet high and 3 feet across. It is a prairie grass typically found in glades, open ground and along railroads from Canada to the United States. Tiny rounded mature seeds drop to the ground from their hulls in autumn giving rise to the descriptive common name. Prairie dropseed grows in average, dry to medium, well-drained soils and has a reputation for being slow to establish itself in a site as well as slow growing. It prefers full sun and dry, rocky soil, but tolerates a wide range of soils, including heavy clays, as well as deer, drought, and other challenges. The flowers arch high above the leaves and provide movement as they sway in the wind dispersing their fragrance said to be reminiscent of buttered popcorn or hot wax. It displays a glossy green fine summer color that turns deep orange in late fall and then fades to light copper. Snow does not flatten the plant, so it is visible even in winter. Prune it back in spring to shape. The root system is fibrous and short-rhizomatous. It can be grown from seed but does not freely self-seed in the garden. Because the seeds are difficult to germinate, it is easier to propagate this grass by dividing the dense tufts of leaves. Once it becomes established at a suitable site, Prairie dropseed is long-lived. This plant is listed by the Department of Agriculture as endangered in seven eastern states, including North Carolina. Use in the upper tier of a rain garden, mass planted in a meadow, as an accent in a rock garden, or as a lawn alternative. It works well to prevent erioson or can be used in the front of a border to line a walkway. Insects, Diseases, and Other Problems: No serious problems.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 52 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (3-15 ft)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Herbaceous Perennial; Native Plant; Ornamental Grasses and Sedges
Life cycle
Perennial
USDA zones
3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Clay; High Organic Matter; Loam (Silt); Sand; Shallow Rocky
Soil drainage
Good Drainage | Occasionally Dry
Available space
3 feet-6 feet
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 2 ft. 0 in. - 3 ft. 0 in. | Width: 2 ft. 0 in. - 3 ft. 0 in.
Growth rate
Slow
Maintenance
Low
Canopy layer
4 - Herbaceous (3-15 ft)
Form & Appearance
Habit / form
Arching; Dense; Mounding
Texture
Fine
Foliage
Deciduous
Leaf color
Green
Leaf type
Fronds
Leaf arrangement
Alternate
Leaf feel
Glossy; Smooth
Leaf value
Showy
Leaf size
> 6 inches long, < 1 inch wide
Hairs present
No
Leaf detail
Thread-like, fine textured, hair-like leaves. Glossy green summer color turns deep orange in late fall then fades to light copper. Leaves (to 20 inches long and 1/16 of an inch wide) typically form an arching foliage mound, 15 inches tall and 18 inches wide.
Fall color
Brown/Copper; Orange
Flower color
Brown/Copper; Pink
Flower value
Fragrant; Showy
Flower form
Panicle
Flower size
> 6 inches
Flower detail
Pink and brown-tinted 3 to 8 inch flowers. Scented , open panicles on slender stems held 3 feet above the foliage. Blooms from August to October. Flowers have pink and brown tints, but are perhaps most noted for their unique fragrance (hints of buttered popcorn, hot wax, or coriander).
Bloom time
Fall; Summer
Fruit color
Brown/Copper
Fruit type
Achene
Fruit detail
Seeds are achenes that are brown and drop to the ground where they are enjoyed by wildlife.
Wildlife & Ecology
Native status
Native
Origin
Canada to U.S.A
Distribution
throughout
Wildlife value
Birds like sparrows and juncos feed on the seeds. Feeds grasshoppers and leafhoppers.
Attracts
Songbirds
Food & Medicine
Fruit type
Achene

Uses (ethnobotany)

Native Americans used the seeds to make flour.

Landscape Use
Landscape location
Meadow; Naturalized Area; Rock Wall; Walkways
Landscape theme
Drought Tolerant Garden; Garden for the Blind; Native Garden; Rock Garden; Winter Garden
Design feature
Accent; Border; Mass Planting
Garden tags
#warm-season grass #drought tolerant #ornamental grass #NC native #erosion control #deer resistant #fall color bronze #native ornamental grass #lawn alternative #foot traffic tolerant #lawn alternative full sun #mass planting #endangered #showy flowers #slow growing #low maintenance #fragrant flowers #winter interest #border front #long lived #HS303 #green roof #walkway
Problems & Resistance
Resistant to
Black Walnut; Deer; Drought; Dry Soil; Erosion; Foot Traffic; Pollution
Propagation
Division; Seed

Planted at Hunnicutt

Nobody’s planted this one yet.