Wildflower (forb) · Boraginaceae
Salt heliotrope
Heliotropium curassavicum · includes its varieties and subspecies
Salt heliotrope is recorded as native to 30 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 293 counties of those states by USDA PLANTS.
Key facts · USDA PLANTS
Salt heliotrope at a glance
- Native in
- 293 counties, across 30 states and territories
- Estimated cold hardiness
- Zone 4b PLANTS minimum temperature −28°F
- Mature height
- 1.2 ft PLANTS mature height
- Light and water
- Full sun (shade-intolerant) Medium water use
Estimated cold hardiness: zone 4b. PLANTS gives a minimum temperature of −28°F; zone 4b winters bottom out at −25°F, the coldest half-zone that stays within that limit.
Salt heliotrope is recorded as native to 30 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 293 counties of those states by USDA PLANTS.
Counties where it is native
The 15 counties with the most ZIP codes among the 293 where it is listed.
Native counties by state
- Alabama 1 county
- Arizona 10 counties
- Arkansas 2 counties
- California 44 counties
- Colorado 6 counties
- Florida 15 counties
- Georgia 3 counties
- Hawaii 4 counties
- Idaho 2 counties
- Kansas 7 counties
- Louisiana 19 counties
- Maine 1 county
- Mississippi 2 counties
- Montana 9 counties
- Nebraska 3 counties
- Nevada 13 counties
- New Jersey 1 county
- New Mexico 11 counties
- North Carolina 1 county
- North Dakota 12 counties
- Oklahoma 10 counties
- Oregon 11 counties
- Pennsylvania 1 county
- South Carolina 1 county
- South Dakota 3 counties
- Texas 66 counties
- Utah 14 counties
- Virginia 2 counties
- Washington 9 counties
- Wyoming 10 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, Subshrub
- Duration
- Annual, Perennial
- Mature height
- 1.2 ft
- Growth rate
- Moderate
- Growth form
- Rhizomatous
- Shape
- Decumbent
- Lifespan
- Moderate
- Active growth period
- Spring, Summer, Fall
Light and water
- Shade tolerance
- Intolerant (full sun (shade-intolerant))
- Moisture use
- Medium water use
- Drought tolerance
- Medium
- Tolerance of waterlogged soil
- Low
- Precipitation range
- 10 to 24 in per year
Soil
- Soil textures
- Medium and fine
- pH range
- 6.5 to 8.5
- Lime (CaCO₃) tolerance
- None
- Salinity tolerance
- High
- Fertility requirement
- Low
- Minimum root depth
- 10 in
Climate
- Minimum temperature
- −28°F
- Estimated cold hardiness
- Zone 4b and warmer
- Minimum frost-free days
- 110
- Fire tolerance
- Medium
Flowers, leaves and fruit
- Flower color
- White
- Showy flowers
- Yes
- Bloom period
- Mid Spring
- Foliage color
- Gray-Green
- Showy in fall
- No
- Keeps leaves
- No
- Fruit color
- Brown
Other
- Toxicity
- None
- Nitrogen fixation
- None
- Nursery availability
- No Known Source
- Family
- Boraginaceae
- PLANTS symbol
- HECU3
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
- Heliotropium curassavicum (PLANTS symbol HECU3), including 2 varieties and 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