Wildflower (forb) · Iridaceae
Virginia iris
Iris virginica · includes its varieties and subspecies
Virginia iris is recorded as native to 27 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 668 counties of those states by USDA PLANTS.
Key facts · USDA PLANTS
Virginia iris at a glance
- Native in
- 668 counties, across 27 states and territories
- Estimated cold hardiness
- Zone 8b PLANTS minimum temperature 12°F
- Mature height
- 3.3 ft PLANTS mature height
- Light and water
- Tolerates shade High water use
Estimated cold hardiness: zone 8b. PLANTS gives a minimum temperature of 12°F; zone 8b winters bottom out at 15°F, the coldest half-zone that stays within that limit.
Virginia iris is recorded as native to 27 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 668 counties of those states by USDA PLANTS.
Counties where it is native
The 15 counties with the most ZIP codes among the 668 where it is listed.
Native counties by state
- Alabama 9 counties
- Arkansas 24 counties
- District of Columbia 1 county
- Florida 18 counties
- Georgia 19 counties
- Illinois 83 counties
- Indiana 63 counties
- Iowa 5 counties
- Kansas 2 counties
- Kentucky 33 counties
- Louisiana 35 counties
- Maryland 2 counties
- Michigan 53 counties
- Minnesota 28 counties
- Mississippi 13 counties
- Missouri 35 counties
- Nebraska 6 counties
- New York 5 counties
- North Carolina 42 counties
- Ohio 32 counties
- Oklahoma 2 counties
- South Carolina 23 counties
- Tennessee 16 counties
- Texas 18 counties
- Virginia 36 counties
- West Virginia 11 counties
- Wisconsin 54 counties
Growing traits
Values from the PLANTS characteristics record. “Not recorded” means PLANTS has no value; nothing here is estimated except the zone.
Growth
- Growth habit
- Forb/herb
- Duration
- Perennial
- Mature height
- 3.3 ft
- Growth rate
- Moderate
- Growth form
- Rhizomatous
- Shape
- Erect
- Lifespan
- Moderate
- Active growth period
- Spring
Light and water
- Shade tolerance
- Tolerant (tolerates shade)
- Moisture use
- High water use
- Drought tolerance
- None
- Tolerance of waterlogged soil
- High
- Precipitation range
- 45 to 65 in per year
Soil
- Soil textures
- Medium and fine
- pH range
- 4.8 to 7.3
- Lime (CaCO₃) tolerance
- Low
- Salinity tolerance
- None
- Fertility requirement
- Medium
- Minimum root depth
- 6 in
Climate
- Minimum temperature
- 12°F
- Estimated cold hardiness
- Zone 8b and warmer
- Minimum frost-free days
- 200
- Fire tolerance
- None
Flowers, leaves and fruit
- Flower color
- Blue
- Showy flowers
- Yes
- Bloom period
- Spring
- Foliage color
- Green
- Showy in fall
- No
- Keeps leaves
- No
- Fruit color
- Black
Other
- Toxicity
- None
- Nitrogen fixation
- None
- Nursery availability
- Routinely Available
- Family
- Iridaceae
- PLANTS symbol
- IRVI
Source & data date
- Source
- USDA NRCS PLANTS Database: county distribution records, native status and plant characteristics. CC0 (public domain dedication, per the data.gov catalog record).
- Kew’s World Checklist of Vascular Plants (WCVP): native or introduced status by state. CC BY 3.0.
- USGS US-RIIS (ver. 2.0): species listed as introduced are excluded. CC0.
- Citation
- USDA, NRCS. 2026. The PLANTS Database (https://plants.usda.gov, 11/04/2026). National Plant Data Team, Greensboro, NC USA.
- Govaerts R. (ed.) (2026). WCVP: World Checklist of Vascular Plants. Facilitated by the Royal Botanic Gardens, Kew. Data file dated 2026-06-04, http://sftp.kew.org/pub/data-repositories/WCVP/ (retrieved 2026-11-04). Paper: Govaerts R. et al. (2021) The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. Scientific Data 8, 215.
- Data date
- Retrieved from PLANTS on November 4, 2026; WCVP data file dated June 4, 2026.
- Scope
- Iris virginica (PLANTS symbol IRVI), including 1 variety or subspecies folded into the species.
- Method
- A species is listed when it is recorded as native to the state in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in the county by USDA PLANTS. Species PLANTS labels both native and introduced are listed separately. Full method · All sources