Index / Search / Sorbus sitchensis var. grayi
§1 Plant
Sorbus sitchensis M. Roem. var. grayi (Wenzig) C.L. Hitchc.
vernacular western mountain ash — variety · Rosaceae
§2Habit & range
Habit and range
- Growth habit
- Shrub, Tree
- Duration
- Perennial
- Group
- Dicot
- Family
- Rosaceae Juss.
- Genus
- Sorbus
§2a
Native status, by region
- AK Alaska Native
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 42 counties across 3 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Low
- Shade
- High
- Moisture use
- Medium
- Fire
- Low
- Salinity
- None
- Anaerobic
- None
- CaCO₃
- None
- Hedging
- Low
§3b
Climate & soil
- Cold tolerance
- -28 °F minimum
- Frost-free days
- 100 min.
- Precipitation
- 20–40 in/yr
- pH range
- 6–7.2
- Root depth
- 16 in min.
- Fertility need
- Medium
- Soil texture
- coarse, medium, fine
§3c
Form & growth
- Growth form
- Single Stem
- Growth rate
- Slow
- Lifespan
- Moderate
- Mature height
- 15 ft
- Height @ 20 y
- 15 ft
- Foliage texture
- Fine
- Foliage colour
- Dark Green
- Porosity (summer)
- Moderate
- Porosity (winter)
- Porous
- Flower colour
- White
- Fruit colour
- Red
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Late Spring
- Seed abundance
- High
- Seed begins
- Summer
- Seed ends
- Fall
- Spread rate
- Moderate
- Stratify
- Yes
- Seeds / lb
- 140,000
- Propagation
- seed, bare root, container
§3e
Use & availability
- Commercial availability
- Contracting Only
- Nursery stock
- No
- Browse palatability
- Low
- Graze palatability
- Low
- Palatable, human
- No
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 42 counties across 3 states/territories.
California view state ↗ 1 N ▾
Oregon view state ↗ 25 N ▾
- Baker 41001
- Benton 41003
- Clackamas 41005
- Clatsop 41007
- Crook 41013
- Curry 41015
- Deschutes 41017
- Douglas 41019
- Grant 41023
- Harney 41025
- Hood River 41027
- Jackson 41029
- Jefferson 41031
- Josephine 41033
- Klamath 41035
- Lane 41039
- Linn 41043
- Marion 41047
- Multnomah 41051
- Polk 41053
- Tillamook 41057
- Umatilla 41059
- Union 41061
- Wallowa 41063
- Wasco 41065
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/SOSIG ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3013000 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T16:37:38Z