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Composite Dropseed

Sporobolus compositus var. compositus

Found in diabase glades and barrens, limestone glades and barrens, disturbed areas over diabase or calcareous rocks. Weakley, Flora of the Southeastern United States (2025), Northern Tier edition What its natural habitat tells you

31
Good

Native to Virginia. How scores work Is it native here?

Profile 94%

Height
About 3 feet
Light
Partial shade, Full sun
Soil moisture
Dry to moist
Will it fit your yard?

Rare or protected plant. Specialist conservation planting; excluded from routine garden suggestions. Plant caution source

Hidden from default planting suggestions. Wildlife value and native status remain unchanged.

At a glance

Bloom
September to November
Fruiting season
Summer to fall

Not yet recorded · Spread · Life cycle · Leaves

Recorded in 10 Virginia counties.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

1 of 3

Glades, barrens and outcrops on limestone

Cedar glade in the Pennyroyal Plain, Simpson County
Limestone cedar glade. Shown: Pennyroyal Plain, Simpson County, Kentucky, a neighboring state.Cedar glade in the Pennyroyal Plain, Simpson County, Mason Brock (Masebrock), undated. Public domain. Source record.

Glades, barrens and outcrops on mafic or serpentine rock

Open, thin-soil openings, outcrops and cliffs on dark, magnesium- or iron-rich rock such as serpentine, diabase or gabbro.

Roadsides, fields and disturbed ground

Ground opened by people: roadsides, old fields, pastures, fencerows and lots.

All habitats

Ecological relationships

Who uses this plant?

What these records mean

2CaterpillarsGenus host records with ranges including VA

Genus host records with ranges including VA · Sporobolus

  • Hesperia leonardusLeonard's Skipper, Blazing Star Skipper, Pawnee Prairie Skipper, Pawnee Montane Skipper
  • Spodoptera frugiperdaFall Armyworm Moth
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
1BeesSoutheastern regional records

Southeastern regional records · Sporobolus

Individual names are not available yet.

Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
0Specialist beesPollen specialists
10BirdsRecorded genus food-resource interactions; not a state feeding claim

Recorded genus food-resource interactions; not a state feeding claim · Sporobolus

  • Agelaius phoeniceusRed-winged Blackbird
  • Ammospiza leconteiiLeConte's Sparrow
  • Calcarius ornatusChestnut-collared Longspur
  • Calcarius pictusSmith's Longspur
  • Catharus fuscescensVeery
  • Euphagus cyanocephalusBrewer's Blackbird
  • Meleagris gallopavoWild Turkey
  • Molothrus aterBrown-headed Cowbird
  • Plectrophenax nivalisSnow Bunting
  • Pooecetes gramineusVesper Sparrow
Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)

Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Poaceae
Flower color
Yellow
Growth rate
Moderate
Growth habit
Grows in clumps
Foliage color
Green
Fruit begins
Summer
Fruit ends
Fall
Growing sources and scope

Conservation status

Virginia rankS2
Global rankG5T5
VA statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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Sources