Grass or grass-like · Juncaceae
Arctic rush
Juncus arcticus · includes its varieties and subspecies
Arctic rush is recorded as native to 1 state or territory in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 22 counties of those states by USDA PLANTS.
Key facts · USDA PLANTS
Arctic rush at a glance
- Native in
- 22 counties, across 1 state or territory
- Estimated cold hardiness
- Zone 3a PLANTS minimum temperature −43°F
- Mature height
- 4 ft PLANTS mature height
- Light and water
- Sun to part shade High water use
Estimated cold hardiness: zone 3a. PLANTS gives a minimum temperature of −43°F; zone 3a winters bottom out at −40°F, the coldest half-zone that stays within that limit.
Arctic rush is recorded as native to 1 state or territory in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 22 counties of those states by USDA PLANTS.
Counties where it is native
The 15 counties with the most ZIP codes among the 22 where it is listed.
- Yukon-Koyukuk Census Area, AK
- Bethel Census Area, AK
- Anchorage Municipality, AK
- Kenai Peninsula Borough, AK
- Lake and Peninsula Borough, AK
- Nome Census Area, AK
- Matanuska-Susitna Borough, AK
- Northwest Arctic Borough, AK
- North Slope Borough, AK
- Fairbanks North Star Borough, AK
- Aleutians West Census Area, AK
- Dillingham Census Area, AK
- Southeast Fairbanks Census Area, AK
- Kodiak Island Borough, AK
- Aleutians East Borough, AK
Native counties by state
- Alaska 22 counties
Growing traits
Values from the PLANTS characteristics record of a variety (JUARL). “Not recorded” means PLANTS has no value; nothing here is estimated except the zone.
Growth
- Growth habit
- Graminoid
- Duration
- Perennial
- Mature height
- 4 ft
- Growth rate
- Rapid
- Growth form
- Rhizomatous
- Shape
- Erect
- Lifespan
- Long
- Active growth period
- Spring and Summer
Light and water
- Shade tolerance
- Intermediate (sun to part shade)
- Moisture use
- High water use
- Drought tolerance
- Low
- Tolerance of waterlogged soil
- High
- Precipitation range
- Not recorded
Soil
- Soil textures
- Medium and fine
- pH range
- 6 to 9
- Lime (CaCO₃) tolerance
- Low
- Salinity tolerance
- High
- Fertility requirement
- Low
- Minimum root depth
- 20 in
Climate
- Minimum temperature
- −43°F
- Estimated cold hardiness
- Zone 3a and warmer
- Minimum frost-free days
- 90
- Fire tolerance
- High
Flowers, leaves and fruit
- Flower color
- Brown
- Showy flowers
- No
- Bloom period
- Early Summer
- Foliage color
- Green
- Showy in fall
- No
- Keeps leaves
- No
- Fruit color
- Brown
Other
- Toxicity
- None
- Nitrogen fixation
- None
- Nursery availability
- Routinely Available
- Family
- Juncaceae
- PLANTS symbol
- JUAR2
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
- Juncus arcticus (PLANTS symbol JUAR2), 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