Tree · Salicaceae
Scouler's willow
Salix scouleriana
Scouler's willow is recorded as native to 13 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 252 counties of those states by USDA PLANTS.
Key facts · USDA PLANTS
Scouler's willow at a glance
- Native in
- 252 counties, across 13 states and territories
- Estimated cold hardiness
- Zone 6a PLANTS minimum temperature −13°F
- Mature height
- 50 ft PLANTS mature height
- Light and water
- Sun to part shade High water use
Estimated cold hardiness: zone 6a. PLANTS gives a minimum temperature of −13°F; zone 6a winters bottom out at −10°F, the coldest half-zone that stays within that limit.
Scouler's willow is recorded as native to 13 states and territories in Kew’s World Checklist of Vascular Plants and USDA PLANTS, and recorded in 252 counties of those states by USDA PLANTS.
Counties where it is native
The 15 counties with the most ZIP codes among the 252 where it is listed.
Native counties by state
- Alaska 12 counties
- Arizona 8 counties
- California 42 counties
- Colorado 20 counties
- Idaho 27 counties
- Montana 15 counties
- Nevada 5 counties
- New Mexico 15 counties
- Oregon 31 counties
- South Dakota 4 counties
- Utah 27 counties
- Washington 29 counties
- Wyoming 17 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
- Shrub, Tree
- Duration
- Perennial
- Mature height
- 50 ft
- Growth rate
- Rapid
- Growth form
- Multiple Stem
- Shape
- Erect
- Lifespan
- Moderate
- Active growth period
- Spring and Summer
Light and water
- Shade tolerance
- Intermediate (sun to part shade)
- Moisture use
- High water use
- Drought tolerance
- Medium
- Tolerance of waterlogged soil
- Medium
- Precipitation range
- 11 to 40 in per year
Soil
- Soil textures
- Coarse, medium and fine
- pH range
- 6.5 to 8
- Lime (CaCO₃) tolerance
- High
- Salinity tolerance
- Low
- Fertility requirement
- Low
- Minimum root depth
- 12 in
Climate
- Minimum temperature
- −13°F
- Estimated cold hardiness
- Zone 6a and warmer
- Minimum frost-free days
- 180
- Fire tolerance
- High
Flowers, leaves and fruit
- Flower color
- Yellow
- Showy flowers
- Yes
- Bloom period
- Early Spring
- Foliage color
- Green
- Showy in fall
- Yes
- Keeps leaves
- No
- Fruit color
- Brown
Other
- Toxicity
- None
- Nitrogen fixation
- None
- Nursery availability
- Contracting Only
- Family
- Salicaceae
- PLANTS symbol
- SASC
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
- Salix scouleriana (PLANTS symbol SASC).
- 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