Quackgrass
Elymus repens
Found in roadsides, disturbed areas, pastures. FloraQuest, phone app (app page) What its natural habitat tells you
—
Not native
Not native to Virginia. How scores work Is it native here?
Profile 82%
- Height
- About 2.6 feet
- Light
- Partial shade, Full sun
- Soil moisture
- Dry to moist
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At a glance
- Bloom
- June to August
- Fruiting season
- Spring to summer
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Not yet recorded · Spread · Life cycle · Leaves
Recorded in 49 Virginia counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Roadsides, fields and disturbed ground
Ground opened by people: roadsides, old fields, pastures, fencerows and lots.
Ecological relationships
Who uses this plant?
26CaterpillarsGenus host records with ranges including VA
Genus host records with ranges including VA · Elymus
- Amblyscirtes vialisCommon Roadside-Skipper, Black Little Skipper
- Ancyloxypha numitorLeast Skipper
- Apamea devastatorGlassy Borer, Glassy Cutworm Moth
- Apamea lignicoloraWood-Colored Apamea
- Apamea sordensBordered Apamea, Rustic Shoulder-Knot
- Cercyonis pegalaCommon Wood Nymph
- Clepsis persicanaWhite Triangle Tortrix
- Dargida diffusaWheat Head Armywotm Moth
- Hydraecia immanisHop Borer, Hop Vine Borer
- Lethe anthedonNorthern Pearly Eye
Show all 26
- Leucania commoidesDusky Wainscot, Comma Wainscot
- Leucania insuetaDarted Wainscot, Heterodox Wainscot
- Leucania phragmitidicolaNeedle Wainscot, Phragmites Wainscot
- Leucania pseudargyriaFalse Wainscot
- Limochores mysticLong Dash
- Lon zabulonZabulon Skipper
- Loscopia velataVeiled Ear Moth, Veiled Grass Moth
- Mythimna unipunctaArmyworm Moth, White Speck
- Nephelodes miniansBronzed Cutworm
- Papaipema cataphractaBurdock Border, Potato-Stalk Borer
- Papaipema nebrisStalk Borer
- Polites themistoclesTawny-Edged Skipper
- Pyrrharctia isabellaIsabella Tiger Moth, Banded Woolybear
- Spodoptera frugiperdaFall Armyworm Moth
- Apamea lutosa
- Elachista illectella
—BeesSoutheastern regional records
—Specialist beesPollen specialists
4BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Elymus
- Alectoris chukarChukar
- Anser albifronsGreater White-fronted Goose
- Perdix perdixGray Partridge
- Plectrophenax nivalisSnow Bunting
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
Growing and identification
Plant details
- Family
- Poaceae
- Flower color
- Yellow
- Growth rate
- Rapid
- Growth habit
- Spreads by rhizomes
- Foliage color
- Green
- Fruit begins
- Spring
- Fruit ends
- Summer
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “June to August” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Yellow” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Foliage color · “Green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit begins · “Spring” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit ends · “Summer” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth habit · “Spreads by rhizomes” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth rate · “Rapid” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Height · “About 2.6 feet” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Light · “Partial shade; Full sun (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
- Soil · “Dry; Moist (documented habitat)” · FloraQuest: Carolinas, Georgia (Southeastern Flora Team), phone app (app page) · Carolinas and Georgia
Also known as
Agropyron repens; Quack Grass
Conservation status
| Virginia rank | SNA |
|---|---|
| Global rank | GNR |
| VA status | Not verified |
| Federal status | Not verified |
Sources
- Digital Atlas of the Virginia Flora
- USDA PLANTS
- FloraQuest: Carolinas, Georgia (Weakley), phone app (app page)
- FloraQuest: Northern Tier (Weakley), phone app (app page)
- NatureServe Explorer
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications