Grass or grass-like · Cyperaceae
Necklace sedge
Carex projecta
Necklace sedge is recorded as native to 18 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 298 counties of those states by USDA PLANTS.
Key facts · USDA PLANTS
Necklace sedge at a glance
- Native in
- 298 counties, across 18 states and territories
- Estimated cold hardiness
- Zone 4a PLANTS minimum temperature −33°F
- Mature height
- 2 ft PLANTS mature height
- Light and water
- Tolerates shade Medium water use
Estimated cold hardiness: zone 4a. PLANTS gives a minimum temperature of −33°F; zone 4a winters bottom out at −30°F, the coldest half-zone that stays within that limit.
Necklace sedge is recorded as native to 18 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 298 counties of those states by USDA PLANTS.
Counties where it is native
The 15 counties with the most ZIP codes among the 298 where it is listed.
Native counties by state
- Connecticut statewide record
- Illinois 12 counties
- Indiana 1 county
- Maine 14 counties
- Maryland 3 counties
- Massachusetts 10 counties
- Michigan 53 counties
- Minnesota 21 counties
- New Hampshire 10 counties
- New Jersey 7 counties
- New York 41 counties
- North Carolina 3 counties
- Ohio 2 counties
- Pennsylvania 45 counties
- Tennessee 6 counties
- Vermont 13 counties
- West Virginia 2 counties
- Wisconsin 55 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
- Graminoid
- Duration
- Perennial
- Mature height
- 2 ft
- Growth rate
- Slow
- Growth form
- Bunch
- Shape
- Erect
- Lifespan
- Moderate
- Active growth period
- Spring, Summer, Fall
Light and water
- Shade tolerance
- Tolerant (tolerates shade)
- Moisture use
- Medium water use
- Drought tolerance
- None
- Tolerance of waterlogged soil
- High
- Precipitation range
- 32 to 55 in per year
Soil
- Soil textures
- Medium and fine
- pH range
- 4.8 to 7
- Lime (CaCO₃) tolerance
- Low
- Salinity tolerance
- None
- Fertility requirement
- Medium
- Minimum root depth
- 8 in
Climate
- Minimum temperature
- −33°F
- Estimated cold hardiness
- Zone 4a and warmer
- Minimum frost-free days
- 80
- Fire tolerance
- High
Flowers, leaves and fruit
- Flower color
- Green
- Showy flowers
- No
- Bloom period
- Late Spring
- Foliage color
- Green
- Showy in fall
- No
- Keeps leaves
- No
- Fruit color
- Brown
Other
- Toxicity
- None
- Nitrogen fixation
- None
- Nursery availability
- Routinely Available
- Family
- Cyperaceae
- PLANTS symbol
- CAPR9
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
- Carex projecta (PLANTS symbol CAPR9).
- 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